State Farm General Ins. Co. v. Lara ( 2021 )


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  • Filed 11/16/21 (unmodified opn. attached)
    CERTIFIED FOR PUBLICATION
    COURT OF APPEAL, FOURTH APPELLATE DISTRICT
    DIVISION ONE
    STATE OF CALIFORNIA
    STATE FARM GENERAL                             D075529
    INSURANCE COMPANY,
    Plaintiff and Appellant,                 (Super. Ct. No. 37-2016-00041469-
    CU-MC-CTL)
    v.
    RICARDO LARA, as Insurance                      ORDER MODIFYING OPINION
    Commissioner, etc.,                             AND DENYING PETITIONS FOR
    REHEARING
    Defendant and Appellant;
    NO CHANGE IN JUDGMENT
    CONSUMER WATCHDOG,
    Intervenor and Appellant.
    THE COURT:
    It is ordered that the opinion filed herein on October 29, 2021, be
    modified as follows:
    On page 3, in the third paragraph, the final sentence, starting with “We
    direct” and ending with “respects,” is to be deleted and replaced with:
    We direct the superior court to modify the writ of mandate to require
    the Rate Order be vacated to the extent inconsistent with this opinion,
    and affirm the judgment and writ of mandate in all other respects.
    On pages 58-59, in the paragraph spanning these pages, the final two
    sentences, starting with “But he does not” and ending with “persuaded,” are
    to be deleted and replaced with:
    Remand is unnecessary for this purpose.
    On page 59, in the sole full paragraph, the third sentence, starting with
    “The superior court” and ending with “entirety,” is to be deleted and replaced
    with:
    The superior court is directed to enter a new and different judgment:
    (i) granting SFG’s petition for writ of administrative mandate; and
    (ii) directing the Commissioner to set aside the Rate Order to the
    extent inconsistent with this opinion.
    There is no change in judgment.
    The petitions for rehearing are denied.
    HUFFMAN, Acting P. J.
    Copies to: All parties
    2
    Filed 10/29/21 (unmodified opinion)
    CERTIFIED FOR PUBLICATION
    COURT OF APPEAL, FOURTH APPELLATE DISTRICT
    DIVISION ONE
    STATE OF CALIFORNIA
    STATE FARM GENERAL                            D075529
    INSURANCE COMPANY,
    Plaintiff and Appellant,               (San Diego Super. Ct. No. 37-2016-
    00041469-CU-MC-CTL)
    v.
    RICARDO LARA, as Insurance
    Commissioner, etc.,
    Defendant and Appellant;
    CONSUMER WATCHDOG,
    Intervenor and Appellant.
    APPEALS from a judgment and writ of mandate of the Superior Court
    of San Diego County, Katherine A. Bacal, Judge. Affirmed in part and
    reversed in part with directions.
    Gibson, Dunn & Crutcher, Theodore J. Boutros, Jr., Kristin A. Linsley,
    Kahn A. Scolnick; Hogan Lovells, Vanessa O. Wells and Victoria C. Brown for
    Plaintiff State Farm General Insurance Company.
    LevatoLaw and Ronald C. Cohen for California Business Roundtable as
    Amicus Curiae on behalf of Plaintiff.
    California Appellate Law Group, Rex Heinke, Jessica Weisel; Akin
    Gump Strauss Hauer & Feld and Shawn Hanson for Personal Insurance
    Federation of California and National Association of Mutual Insurance
    Companies as Amici Curiae on behalf of Plaintiff.
    Xavier Becerra and Rob Bonta, Attorneys General, Diane S. Shaw and
    Tamar Pachter, Assistant Attorneys General, Molly K. Mosley and Michael
    Sapoznikow, Deputy Attorneys General, for Defendant Ricardo Lara in his
    official capacity as Insurance Commissioner of the State of California.
    Strumwasser & Woocher, Michael J. Strumwasser, Bryce A. Gee,
    Caroline C. Chiapetti; Harvey Rosenfield and Pamela Pressley, for Intervenor
    Consumer Watchdog.
    INTRODUCTION
    This appeal arises from an application by State Farm General
    Insurance Company (SFG) to increase its homeowners’ insurance rates,
    under the prior approval system implemented by Proposition 103 (Ins. Code,
    § 1861.01 et seq.)1 Nonprofit Consumer Watchdog (CW) intervened in the
    proceeding, and challenged SFG’s proposed rates. Section 1861.05,
    subdivision (a) (§ 1861.05(a)), requires the Insurance Commissioner to
    “consider whether the rate mathematically reflects the insurance company’s
    investment income.” The Commissioner relied on regulation section 2644.20,
    addressing projected yield, to use the combined annual statement of SFG’s
    parent company, State Farm Mutual Automobile Insurance Company (State
    Farm Mutual) and its property-casualty affiliates. The Commissioner
    ordered SFG to decrease its rate retroactively and issue refunds (Rate Order).
    1      Further statutory references are to the Insurance Code unless noted.
    Regulation references are to the Proposition 103 regulations (Cal. Code Regs.,
    tit. 10, § 2641.1 et seq.), unless noted.
    2
    SFG filed a petition for writ of mandate. The superior court
    determined section 1861.05(a) requires the rate to mathematically reflect the
    applicant insurer’s income, and the Commissioner’s interpretation and
    application of regulation section 2644.20 to use the income of SFG’s affiliates
    conflicted with the statute. The court entered judgment for SFG, issued a
    peremptory writ of mandate requiring the Rate Order be set aside, and
    remanded remaining issues to the Commissioner, including the propriety of
    the retroactive rate and refund.
    The Commissioner and CW (Appellants) appeal from the judgment and
    writ of mandate, contending the Commissioner properly interpreted the
    statute and regulation and had authority to set an earlier effective date and
    require refunds.2 SFG cross-appeals from the order directing remand to the
    Commissioner, which it argues is unnecessary in light of the impropriety of
    the retroactive rate and refund as well as a subsequent rate change for SFG.
    We conclude the superior court correctly determined section 1861.05(a)
    requires use of the applicant insurer’s income, and the Commissioner erred in
    interpreting and applying Regulation 2644.20 here. We further conclude the
    retroactive rate and refund were impermissible, and remand is not warranted
    under the circumstances. We direct the superior court to modify the writ of
    mandate to require the Rate Order be vacated in its entirety, and affirm the
    judgment and writ of mandate in all other respects.
    2     For clarity, we generally refer to points made by at least one appellant
    (the Commissioner or CW) as being by Appellants, and distinguish between
    them as warranted.
    3
    FACTUAL AND PROCEDURAL BACKGROUND
    A.    Proposition 103
    Proposition 103 was approved by voters in November 1988, and made
    “numerous fundamental changes in the regulation of automobile and other
    types of insurance,” including homeowners’ insurance and excluding certain
    lines not at issue here. (Calfarm Ins. Co. v. Deukmejian (1989) 
    48 Cal.3d 805
    ,
    812 (Calfarm); id. at p. 812, fn. 1.) Previously, insurers set rates in an “ ‘open
    competition’ system,” and rates had increased significantly. (20th Century
    Ins. Co. v. Garamendi (1994) 
    8 Cal.4th 216
    , 300 (20th Century); see Stats.
    1988, Prop. 103, uncodified § 1 [Findings & Declaration.].) Proposition 103
    explained its purpose was “to protect consumers from arbitrary insurance
    rates and practices, to encourage a competitive insurance marketplace, to
    provide for an accountable Commissioner, and to ensure that insurance is
    fair, available, and affordable for all Californians.” (Stats. 1988, Prop. 103,
    uncodified § 2 [“Purpose”]; see also id., uncodified § 8, subd. (a) [“This Act
    shall be liberally construed and applied in order to fully promote its
    underlying purposes”].)
    With respect to rate setting, Proposition 103 had two main components.
    First, it imposed a rollback of rates to 20 percent less than their November
    1987 levels, for one year after passage (through November 1989). (§ 1861.01,
    subd. (a).) This is sometimes called the “rollback year” or “rollback period.”
    (20th Century, 
    supra,
     8 Cal.4th at pp. 243, 253.) During this period, insurers
    could set a different rate to avoid confiscation, subject to Commissioner
    review and the risk of having to refund amounts in excess of a minimally
    non-confiscatory rate. (§ 1861.01, subd. (b); 20th Century, at p. 254.) For
    4
    purposes of this appeal, “confiscatory” can be understood generally to mean
    “inadequate.” (See Calfarm, supra, 48 Cal.3d at p. 822, fn. 15.)3
    Second, Proposition 103 implemented a “prior approval” system, which
    provided that as of November 1989, “insurance rates subject to this chapter
    must be approved by the commissioner prior to their use.” (§ 1861.01, subd.
    (c).) Section 1861.05(a) addresses approval of rates, and provides:
    “No rate shall be approved or remain in effect which is
    excessive, inadequate, unfairly discriminatory or otherwise
    in violation of this chapter. In considering whether a rate
    is excessive, inadequate or unfairly discriminatory, no
    consideration shall be given to the degree of competition
    and the commissioner shall consider whether the rate
    mathematically reflects the insurance company’s
    investment income.”
    The remainder of section 1861.05 sets forth procedural requirements for rate
    applications (§ 1861.05, subd. (b)) and public notice provisions (§ 1861.05,
    subds. (c)-(d)).
    The California Supreme Court has explained that section 1861.05(a)’s
    requirement that the Commissioner “ ‘shall consider whether the rate
    mathematically reflects the insurance company’s investment
    income’ . . . impliedly requires that the commissioner shall offset the latter
    against the former.” (20th Century, supra, 8 Cal.4th at pp. 290-291.)
    Insurance companies have two main sources of income: premiums and
    investments. (See Rejda & McNamara, Principles of Risk Management and
    Insurance (12th ed. 2014) p. 127; accord, Werner and Modlin, Basic
    3     What it means for a rate to be confiscatory in this context has been
    disputed, including in 20th Century and this case. (See, e.g., 20th Century,
    
    supra,
     8 Cal.4th at pp. 262-263; see also Mercury Casualty Co. v. Jones (2017)
    
    8 Cal.App.5th 561
    , 583-584 (Mercury).) Because we do not reach the issue
    here, we need not define the term further.
    5
    Ratemaking (5th ed. 2016) p. 5 [describing income sources as “underwriting
    profit and investment income”].) Thus, Proposition 103 provides for lower
    premium rates when investment income is high, and higher rates when that
    income is low. This is consistent with a “total return” ratemaking approach,
    in which the premium an insurer can charge is a function of other available
    income sources, thus avoiding an unreasonable rate of return. That said,
    Proposition 103 did “not establish a detailed method of processing and
    deciding rate applications,” and “[m]uch [was] necessarily left to the
    [Commissioner] . . . .” (Calfarm, supra, 48 Cal.3d at p. 824.) The
    Commissioner promulgated regulations to implement Proposition 103, which
    we describe shortly.
    Calfarm and 20th Century were early and significant decisions
    regarding Proposition 103, and specifically the rollback period. In Calfarm,
    the California Supreme Court “upheld, inter alia, Proposition 103’s provision
    requiring rate rollbacks.” (20th Century, supra, 8 Cal.4th at p. 240.) A few
    years later, in 20th Century, the Court upheld the “implementation of
    Proposition 103’s rate rollback requirement provision by the Insurance
    Commissioner.” (Ibid.)
    B.    Regulations
    The regulations contain formulas for determining the “maximum
    permitted earned premium” and “minimum permitted earned premium” (Reg.
    §§ 2644.2, 2644.3); these turn in part on “investment income factors” (Id.,
    § 2644.19) and may be subject to variances (Id., § 2644.27). Broadly
    speaking, investment income is calculated by multiplying projected yield by
    other figures defined elsewhere in the regulations, regarding reserves,
    surplus, and federal income taxes. (Id., § 2644.19.)
    6
    Projected yield is central to this appeal. This factor initially was based
    on “imbedded yield,” calculated using “the insurer’s net investment income.”
    (Register 92, No. 3, p. 728.30; Register 92, Nos. 15-17, p. 728.32; Register 95,
    Nos. 10-11, p. 728.26.) Effective 2007, the regulation was amended as
    follows:
    “ ‘Projected yield’ means the weighted average yield
    computed using the insurer’s actual portfolio and yields
    currently available on securities in US capital markets.
    The weights shall be determined using the insurer’s most
    recent consolidated statutory annual statement, and shall
    be computed by dividing the insurer’s assets in each
    separate asset class . . . .”
    (Register 2007, No. 1; reg. § 2644.20, subd. (a).) A set yield was assigned for
    each asset class, with bonds having lower yields and stocks having higher
    ones. (Reg. § 2644.20, subd. (c).)4
    Reserves are funds for expected liabilities (Werner and Modlin, at
    p. 317), while surplus is “available capital backing up premiums.” (20th
    Century, 8 Cal.4th at pp. 259, 290; see id. at p. 290 [surplus may
    “simultaneously support the insurance business and earn investment
    income”].) In the regulations, both are based on industry-wide averages.
    (Reg. § 2644.21 [requiring industry-wide reserve ratios]; id., § 2644.22
    [surplus ratio is reciprocal of leverage factor]; id., § 2644.17 [requiring
    industry-wide leverage factors].) The federal income tax factors are based on
    tax rates, subject to certain adjustments (including, in part, weighted yield
    under Reg. § 2644.20). (Id., § 2644.18.)
    4      There were later amendments to the yield provisions, but they are not
    at issue here. (See Register 2008, No. 20; Register 2018, No. 8.)
    7
    C.    The NAIC and Insurer Reporting
    The National Association of Insurance Commissioners (NAIC) is an
    organization of insurance regulators from each state that identifies best
    practices and promotes uniformity. The NAIC has financial statement forms
    (or “blanks”), instructions, and an Accounting Practices and Procedures
    Manual for insurer reporting.5 Relevant here, there is a blank for a
    combined annual statement for affiliated property/casualty insurers. The
    instructions provide that “[e]very group of affiliated insurers” that meet
    conditions described therein shall file a combined annual statement with the
    NAIC Support and Services Offices. They further indicate the statement’s
    “primary purpose” is “to provide the NAIC database with combined data for
    each group of affiliated insurers for use by the NAIC in statistical research
    and analysis.”
    The Insurance Code requires each insurer doing business in California
    to file annual and quarterly statements with the Commissioner. (§ 900.)
    They must use the NAIC statement blanks and instructions, and complete
    them consistent with the NAIC manual, “to the extent . . . not [in] conflict”
    with code provisions. (§ 923.) A separate provision requires insurers to file
    copies of their annual and quarterly statements with the NAIC. (§ 931.)
    D.    Background on SFG
    SFG is a wholly-owned subsidiary of State Farm Mutual, which also
    has seven other property/casualty affiliates. These entities are sometimes
    5     We grant SFG’s request for judicial notice of the NAIC instructions,
    annual statement blank, and manual in effect when SFG filed its rate
    application. (Evid. Code, §§ 452, subd. (h), 459.)
    8
    described here as “State Farm Group,” and most, including SFG, are
    domiciled in Illinois.6
    SFG took its current form after 1998, when State Farm began the
    process of converting SFG to a California-specific company for non-
    automobile lines, to better manage “the unusual risks presented by
    California’s exposure to catastrophes,” while “segregat[ing] [that] exposure”
    and avoiding “cross-subsidiz[ation]” of California policyholders. As a result,
    SFG did not renew non-California homeowners’ policies, and started offering
    coverage to California homeowners previously insured by a different State
    Farm entity. By the time of the rate hearing here, SFG insured
    approximately 20 percent of California homeowners. State-specific entities
    were also developed for Florida and Texas, with State Farm Fire and
    Casualty Insurance Company issuing policies in the remaining states.
    SFG has its own board of directors and officers, with those individuals
    serving other State Farm entities as well. SFG also takes part in shared
    services agreements for functions including underwriting, collections, and
    legal, and does not have its own employees. SFG also receives reinsurance
    protection, a credit line, and coverage of California Earthquake Authority
    contributions from State Farm Mutual, and participates in a liquidity pool for
    affiliates that operates like a money market fund.
    As for investments, State Farm has an investment department that has
    stated investment policies, and which develops a specific investment plan for
    each entity. The investment department recommended a 100 percent bond
    portfolio for SFG, based on its business needs and exposures, which was
    submitted to SFG’s investment committee and then its board. State Farm
    6     We also sometimes use “State Farm,” when the record is unclear in
    distinguishing State Farm Mutual from State Farm Group.
    9
    Group has a significant stock portfolio, with approximately 40 percent of
    assets in stocks at the relevant time. Although many large insurers have
    intercompany pooling agreements, in which premiums and losses are pooled
    and distributed, SFG has no such arrangement. SFG maintains that it relies
    on its surplus to meet policyholder needs, and that State Farm Mutual does
    not have access to it.
    SFG files its own annual statement. State Farm Mutual does so as
    well, and also files a combined annual statement with the NAIC for State
    Farm Group. The combined statement does not specify which affiliate owns
    which assets.
    E.    Rate Application and Hearing
    In early 2014, the Commissioner approved a homeowners’ insurance
    rate request submitted by SFG the previous year.7 That application
    identified a projected yield of 4.94 percent on $128.8 billion in invested
    assets. In December 2014, SFG submitted another application to increase
    rates, by 6.9 percent (later amended to 6.4 percent), effective July 15, 2015.
    SFG used its individual assets, and identified a projected yield of 2.40 percent
    on $5.7 billion in invested assets. CW intervened in the proceeding, and
    argued in part that SFG failed to use data required by regulation section
    2644.20, thus understating projected yield and resulting in an excessive
    rate.8 On June 22, 2015, the Commissioner issued a Notice of Hearing,
    which stated in part:
    7     We grant CW’s request for judicial notice of SFG’s prior rate
    application. (Evid. Code, §§ 452, subd. (h), 459.)
    8     Another nonprofit intervenor, Consumer Federation of California, is
    not a party to this appeal.
    10
    “[E]ffective July 15, 2015, Applicant must reduce its rates
    by 6.6 [percent] or any other amount by which they are
    determined through this proceeding to be excessive. [¶] To
    the extent Applicant charges excessive rates after July 15,
    2015 and before implementing any rate change ordered as
    a result of this proceeding, Applicant will owe refunds . . . .”
    The notice also stated that one of the hearing issues was “if a rate increase is
    indicated effective July 15, 2015, whether and how much Applicant must pay
    as refunds and interest . . . between July 15, 2015 and the date Applicant
    implements the new rate.”
    An administrative law judge (ALJ) held a lengthy rate proceeding, with
    written testimony, cross-examination, and exhibits. Witnesses included SFG
    executives, representatives from the California Department of Insurance
    (Department), and experts. We described some of the evidence regarding
    SFG’s operations above. Relevant here, a Department witness also
    acknowledged SFG was not in a pooling arrangement, and that if State Farm
    Mutual lost money in stocks, it “couldn’t just take particular earnings from
    [SFG’s] bonds” to cover its investment losses. The witness did question
    whether SFG chose its own investments, and opined it did “not seem
    reasonable that SFG would choose to invest 100 [percent] of its surplus in
    low-yielding bonds given all of the protection it has from its parent.” During
    the hearing, CW and the Department filed motions to strike portions of SFG’s
    evidence, arguing SFG was improperly seeking to relitigate the regulatory
    ratemaking formula. The ALJ granted the motions in part, striking evidence
    “offered for the purpose of using SFG’s individual annual statement to
    calculate Projected Yield.” The ALJ did allow certain evidence about SFG’s
    operations because it could be pertinent to a variance issue.
    After the hearing, the ALJ issued its decision, which the Commissioner
    adopted as its Rate Order in November 2016. The order set forth background
    11
    facts about SFG’s operations, including regarding the 1998 reorganization;
    SFG’s participation in shared services and reinsurance arrangements with its
    affiliates; and State Farm Mutual’s purported control of SFG.
    The Rate Order required SFG to reduce its rates by seven percent (over
    13 percent below the applied-for rate). In reaching this result, the
    Commissioner determined regulation section 2644.20 required use of the
    consolidated annual statement filed by State Farm Mutual to calculate SFG’s
    projected yield, and the projected yield was 5.84 percent. He explained the
    term “mathematically reflects” in section 1861.05(a) “only requires that the
    calculation . . . be mathematically accurate,” and “does not determine which
    statement will be used when an insurance company is a group.” He further
    explained the industry was largely comprised of national, group insurers;
    insurers in groups were required to “perform risk management on [a] . . .
    group basis”; and using consolidated statements was “consistent with the
    regulatory framework within which insurers may transfer assets between
    affiliates . . . as State Farm Mutual undoubtedly did when it reconfigured
    SFG in 1998.” The Commissioner found no conflict between “actual portfolio”
    and “consolidated . . . statement” in the regulation, stating the “consolidated
    annual statement is [SFG’s] actual portfolio on a group basis.” He noted the
    “term[] ‘actual portfolio’ distinguish[ed] the current definition of projected
    yield . . . from the previous version which defined the projected yield as an
    ‘imbedded yield.’ ”
    The Commissioner further determined the rate formula “support[ed]
    [a] . . . decrease . . . retroactive to July 15, 2015.” He acknowledged SFG
    contested retroactive reduction, and explained, inter alia, that “maintaining
    [the initial effective date] to approve new rates retroactively” serves several
    purposes, including manageability; using an interim rate and refund were
    12
    consistent with the Insurance Code and 20th Century; and the Notice of
    Hearing had put SFG on notice. SFG represents the refunds totaled about
    $100 million. The Commissioner also rejected SFG’s argument that the rate
    was confiscatory.9
    F.    Superior Court Proceedings
    In November 2016, SFG filed a petition for writ of administrative
    mandate to the superior court, challenging the use of group data, arguing the
    rate was confiscatory and raised constitutional concerns, and contending the
    retroactive rate and refund were impermissible.10 SFG also sought a stay of
    the Rate Order pending resolution of the petition. In December 2016, the
    superior court stayed the refund, but not the rate reduction. SFG reduced its
    rates, consistent with the Rate Order.
    In March 2018, the superior court issued its order, focusing on SFG’s
    position that the Commissioner “improperly attributed income to [SFG] from
    its affiliate’s assets,” and its arguments that the new rate was inconsistent
    with section 1861.05(a) and exceeded the Commissioner’s regulatory
    authority. The court agreed.
    The superior court began by describing section 1861.05(a), and noting
    that, “On its face, the statute says the Commissioner must consider the
    9      The Commissioner made other determinations which are not at issue
    here, including as to the leverage factor variance (which SFG challenged in
    the superior court, but is not pursuing here), and the catastrophe adjustment
    factor (which SFG did not challenge in the superior court at all). The
    Commissioner notes these determinations in arguing for a remand, which we
    address post.
    10     SFG also sought traditional mandate and declaratory and injunctive
    relief, but the superior court issued a writ of administrative mandate and the
    parties focus on that aspect of the petition. We do so as well.
    13
    ‘insurance company’s’ investment income.” The court then described the
    Commissioner’s reliance on regulation section 2644.20, and the NAIC
    reporting requirements. The court acknowledged the Commissioner’s
    interpretation is due great weight but found deference was not warranted
    here:
    “Under section 1861.05, the rate must mathematically
    reflect State Farm’s investment income. Regulation section
    2644.20 is consistent with the statute in that it requires the
    yield to be computed using [SFG’s] ‘actual portfolio.’ . . .
    The Commissioner’s interpretation that the regulation
    allows him to use [State Farm Mutual]’s group yield
    instead of [SFG’s] investment income based on [SFG’s]
    actual portfolio is inconsistent with the statute. [SFG’s]
    actual portfolio consists almost entirely of bonds.
    [Citation.] However, the Commissioner used the combined
    assets for 9 affiliates to come up with a portfolio consisting
    of about 40 [percent] equities. [Citation.] Consequently,
    the decision must be set aside.”11
    The superior court also rejected the Commissioner’s reliance on other
    Insurance Code sections to contend the term “company” encompasses
    affiliates and NAIC’s purported definition of a company as “company and its
    affiliates,” explaining in part that there was only one applicant here—SFG.
    11    The superior court observed here that the “regulation requires the
    Commissioner to use [SFG’s] consolidated annual statement, but in this
    instance [SFG’s] figures are included in [State Farm Mutual]’s statement
    because of NAIC’s rules” and “the NAIC does not allow [SFG] to file its own
    annual statement.” Appellants criticize this finding as inaccurate, and assert
    other ways in which the court purportedly was confused. Viewed in context,
    the court may have meant SFG does not file a consolidated statement under
    NAIC rules. Regardless, any error here is immaterial; as discussed post, the
    appeal focuses on statutory and regulatory interpretation and we apply de
    novo review. (Cf. Mercury, supra, 8 Cal.App.5th at p. 584 [“any error the
    superior court might have made,” in improperly deferring to Commissioner’s
    interpretation, “was necessarily harmless”].)
    14
    The court did not reach other issues raised by the parties, including the
    retroactive rate and refund, rejected SFG’s argument that the ALJ
    improperly excluded certain evidence, and remanded for further proceedings.
    In February 2019, the court entered judgment for SFG and issued a
    peremptory writ of mandate, requiring the Commissioner to set aside the
    Rate Order to the extent inconsistent with its March 2018 order and
    reconsider remanded issues. The Commissioner and CW appealed from the
    judgment and writ of mandate, and SFG appealed from the ruling directing
    remand to the Commissioner. The California Business Roundtable, Personal
    Insurance Federation of California, and National Association of Mutual
    Insurance Companies applied to file amicus curiae briefs on behalf of SFG.
    We granted the applications, and the parties filed responsive briefs.
    DISCUSSION
    I.    Appeal From Judgment
    Appellants argue section 1861.05(a) permits use of group income, the
    Commissioner properly interpreted and applied regulation section 2644.20,
    and the rate effective date and refund were proper. They also disagree with
    SFG’s arguments for affirmance that the Rate Order was confiscatory and
    otherwise unconstitutional. We reject Appellants’ arguments regarding the
    statute and regulation, address the retroactive rate and refund in connection
    with SFG’s cross-appeal and conclude they were improper, and need not and
    do not address confiscation or constitutionality.
    A.    Applicable Law
    1.    Statutory and Regulatory Interpretation
    “ ‘When construing a statute, we must “ascertain the intent of the
    Legislature so as to effectuate the purpose of the law.” ’ [Citations.] ‘In
    determining such intent, a court must look first to the words of the statute
    15
    themselves, giving to the language its usual, ordinary import and according
    significance, if possible, to every word, phrase and sentence in pursuance of
    the legislative purpose.’ [Citation.] At the same time, ‘we do not consider . . .
    statutory language in isolation.’ [Citation.] Instead, we ‘examine the entire
    substance of the statute in order to determine the scope and purpose of the
    provision, construing its words in context and harmonizing its various parts.’
    [Citation.] Moreover, we ‘ “read every statute ‘with reference to the entire
    scheme of law of which it is part so that the whole may be harmonized and
    retain effectiveness.’ ” ’ ” (State Farm Mutual Automobile Ins. Co. v.
    Garamendi (2004) 
    32 Cal.4th 1029
    , 1043 (Garamendi).)
    “If the statutory language is clear and unambiguous, then we need go
    no further. [Citation.] If, however, the language is susceptible to more than
    one reasonable interpretation, then we look to ‘extrinsic aids, including the
    ostensible objects to be achieved, the evils to be remedied, the legislative
    history, public policy, contemporaneous administrative construction, and the
    statutory scheme of which the statute is a part.’ ” (Hoechst Celanese Corp. v.
    Franchise Tax Bd. (2001) 
    25 Cal.4th 508
    , 519.)
    “The rules governing interpretation of statutes generally apply also to
    initiatives and regulations.” (Spanish Speaking Citizens’ Foundation, Inc. v.
    Low (2000) 
    85 Cal.App.4th 1179
    , 1214 (Spanish Speaking Citizens); see, e.g.,
    Silva v. Humboldt (2021) 
    62 Cal.App.5th 928
    , 934 [if language is not
    ambiguous, we presume “voters intended the meaning apparent from that
    language,” and “may not add to the statute or rewrite it to conform to some
    assumed intent”].) A regulation also “must fit ‘within the scope of authority
    conferred’ by the Legislature.” (Association of California Ins. Cos. v. Jones
    (2017) 
    2 Cal.5th 376
    , 390 (ASIC); 
    ibid.
     [“[r]egulations that alter or amend the
    statute, or enlarge or impair its scope, are invalid”]; see In re Gadlin (2020)
    16
    
    10 Cal.5th 915
    , 926 [regulations must be “ ‘consistent and not in conflict
    with’ ” statute]; Assoc. of Cal. Ins. Cos. v. Poizner (2009) 
    180 Cal.App.4th 1029
    , 1044 (Poizner) [accord].)
    Courts take “ultimate responsibility for the construction of the statute,”
    while according “great weight and respect to the administrative
    construction.” (Yamaha Corp. of America v. State Bd. Of Equalization (1998)
    
    19 Cal.4th 1
    , 12 (Yamaha).) We discuss deference in more detail while
    addressing the parties’ arguments post.
    2.    Standard of Review
    The superior court applies independent judgment review to a rate
    order. (§ 1858.6; see Poizner, supra, 180 Cal.App.4th at p. 1045 [independent
    judgment standard requires “ ‘strong presumption of correctness to the
    Commissioner’s findings . . . but ultimately the trial court is free to reweigh
    the evidence’ ”]; see Fukuda v. City of Angels (1999) 
    20 Cal.4th 805
    , 824
    [where trial court applies independent judgment review, reviewing court
    applies substantial evidence review to factual findings]; 20th Century, 
    supra,
    8 Cal.4th at p. 271 [independent review applies to questions of law and mixed
    questions of law and fact that are predominantly legal].)
    “Interpretation of a statute or regulation is, of course, an issue of law
    for the court [citations], as is the question whether a regulation is consistent
    with the authorizing statute [citation]. Thus, we must review the
    interpretations of the [agency] and the trial court de novo, and come to our
    own independent conclusions on these issues.” (Spanish Speaking Citizens,
    supra, 85 Cal.App.4th at p. 1214; see Mercury, supra, 8 Cal.App.5th at p. 584
    [“Engaging in our own independent judicial review, as we must, we will not
    defer to either the commissioner or the superior court”].)
    17
    B.    Section 1861.05(a)
    1.    Statutory Language
    We begin with the central statutory interpretation issue here: what it
    means to “consider whether the rate mathematically reflects the insurance
    company’s investment income.” (§ 1861.05(a).)
    Appellants argue this language is an “open-ended provision that must
    be implemented through regulations,” which does not dictate “how
    investment income is to be projected” and simply requires its consideration.
    SFG contends the phrase means “the proposed rate must be adjusted by the
    applicant’s projected investment income to meet the premium need—a
    straightforward mathematical offset,” and the Commissioner cannot
    “disregard the mathematical correlation of the rate to the insurance
    company’s investment income . . . .” We conclude “consider” cannot be read in
    isolation, and when we view it alongside “mathematically reflects” and
    “insurance company[]”—as we must—the only reasonable interpretation is
    that urged by SFG. As we shall explain, the statute requires the
    Commissioner to use the actual projected investment income of the applicant
    insurer.
    a.    “Consider”
    “To ‘consider’ means to ‘think about carefully’ or to ‘take into account.’ ”
    (Plantier v. Ramona Municipal Water Dist. (2019) 
    7 Cal.5th 372
    , 386
    (Plantier), citing Webster’s 9th New Collegiate Dict. (1987) pp. 279-280;
    accord, Merriam-Webster’s Collegiate Dict. 11th Ed. (2019) pp. 265-266
    (Webster’s Dict.).) Viewed alone, “consider” could imply a range of levels of
    review, from mere contemplation to full incorporation. But “consider” is not
    alone here; it is part of a directive that also requires “mathematical[]
    reflect[ion]” for an “insurance company[].” Interpreting “consider” here to
    18
    mean any level of review, as Appellants contend, would render those words
    surplusage. (Briggs v. Eden Council for Hope & Opportunity (1999) 
    19 Cal.4th 1106
    , 1118 (Briggs) [“ ‘ “Courts should give meaning to every word of
    a statute if possible, and should avoid a construction making any word
    surplusage.” ’ ”]; Garamendi, supra, 32 Cal.4th at p. 1045 [“ ‘An
    interpretation that renders statutory language a nullity is obviously to be
    avoided.’ ”].)
    The case law supports this interpretation. As noted ante, the
    California Supreme Court has observed that section 1861.05(a) “impliedly
    requires that the commissioner shall offset” investment income against the
    rate. (20th Century, supra, 8 Cal.4th at p. 290.) Mere review, or really
    anything less than substantive incorporation, of the applicant’s investment
    income is inconsistent with such an offset. Courts in other contexts have
    concluded the word “consider” requires substantive incorporation, as well.
    (See, e.g., Plantier, supra, 7 Cal.5th at pp. 381, 386 [where proposition barred
    local agency from imposing property-related fee “ ‘[i]f written protests . . . are
    presented by a majority of owners,’ ” thus requiring it to count all written
    protests, requirement to also “ ‘consider all protests’ ” had to “mean more
    than simply counting” them and required “tak[ing] [them] into account when
    deciding whether to approve the proposed fee”]; MK Hillside Partners v.
    Comm’r of Internal Revenue (9th Cir. 2016) 
    826 F.3d 1200
    , 1205 [disagreeing
    that statute granting tax court “jurisdiction to consider” statute of limitations
    argument by partner did not permit determination of issue; “it is unlikely
    that Congress enacted ‘[the statute] to enable a partner to raise an argument
    pertaining to timeliness about which the Tax Court may only ruminate’ ”].)
    Accordingly, we reject the Commissioner’s contention that the only
    constraint under section 1861.05(a) is that “no consideration shall be given to
    19
    the degree of competition.” Just as “consider[]” imposes a mandatory limit on
    using market competition, so too does “consider” impose a mandatory
    obligation to use the insurance company’s investment income. (See People v.
    Blackburn (2015) 
    61 Cal.4th 1113
    , 1125 [“ ‘it is generally presumed that
    when a word is used in a particular sense in one part of a statute, it is
    intended to have the same meaning if it appears in another part of the same
    statute’ ”]; see Chandis Securities Co. v. City of Dana Point (1996) 
    52 Cal.App.4th 475
    , 486 [accord].)
    We also disagree with CW that “consider whether” implies a “ ‘yes’ or
    ‘no’ answer,” such that the Commissioner just needs to affirm he considered
    investment income, and that SFG’s interpretation ignores the word
    “whether.” Viewed in context, “consider whether” reasonably reflects the
    Commissioner is reviewing a proposed rate, not setting it. (§ 1861.05(a) [“[n]o
    rate shall be approved . . . .”]; 20th Century, 
    supra,
     8 Cal.4th at pp. 284-285
    [under Prop. 103, Commissioner does not set rates, but rather “determines
    the rate . . . that the individual insurer may itself set”].) This is also
    consistent with section 1861.05(a) as a whole. It is in “considering whether a
    rate is excessive, inadequate or unfairly discriminatory” that the
    Commissioner is considering investment income. (§ 1861.05(a).) That
    language likewise reflects the Commissioner is reviewing a proposed rate,
    and, at least for excessive or inadequate rates, does not call for a yes or no
    answer. Indeed, the Rate Order did not just state SFG’s rate was excessive;
    it identified a purported percentage amount by which it had to be reduced.
    b.     “Mathematically Reflects”
    We turn next to “mathematically reflects.” “Mathematically” means
    “rigorously exact: precise, certain,” while “reflect” in this context means to
    “make manifest or apparent” and to “mirror.” (Webster’s Dict., at pp. 765,
    20
    1046.) Viewed together and in context, these words mean the rate must
    correlate to the insurance company’s actual projected investment income—
    meaning, in turn, the Commissioner must use data capturing that income in
    his review. This reading is consistent with the “excessive” and “inadequate”
    language in section 1861.05(a), which implies there are set higher and lower
    limits. (See 20th Century, 
    supra,
     8 Cal.4th at p. 285 [under prior approval
    system, “ratemaking formula is used to fix . . . the range of rates within the
    bounds of the ‘excessive’ and the ‘inadequate’ ”].) Interpreting the statute to
    require use of the insurer’s actual projected investment income ensures the
    approved rate falls within the acceptable range. Permitting use of data that
    may simply relate to the insurer—such as aggregate data with affiliates that
    do not share assets—could lead to rates outside that range.
    Appellants’ arguments do not compel a different result. First, they
    contend the term “mathematical” does not preclude generic calculations.
    They explain some rate review factors already utilize industry-wide data and
    other non-company specific information, citing the generic calculations used
    for different asset classes in regulation section 2644.20 and certain
    investment income factors, like the leverage factor underlying the surplus
    ratio factor and the tax factors. (See Reg. §§ 2644.20, subds. (b)-(c), 2644.17-
    2644.19, 2644.22; see descriptions ante.) Although a generic calculation may
    suffice for certain aspects of the rate determination, it does not follow that it
    will be adequate for a factor that purports to capture the insurer’s actual
    portfolio, like projected yield. Nor is a generic calculation even at issue.
    Indeed, it is because projected yield varies based on the portfolio at issue that
    using group-level data can result in a different amount of investment income.
    Second, CW focuses on the Commissioner’s role in administering
    section 1861.05(a), arguing the phrase “mathematically reflects” is unusual
    21
    and the statute does not dictate how to apply it, whereas the Commissioner
    has discretion as to what to include in investment income. The
    Commissioner himself elsewhere emphasizes his “broad authority” to “use . . .
    many different kinds of data . . . .” But the words “mathematically reflect[]”
    have meaning, regardless of being uncommon or undefined in the statute,
    and the Commissioner’s discretion is limited by the statutory text. (Yamaha,
    supra, 19 Cal.4th at pp. 10-11.) CW again attempts to rely on 20th Century,
    citing its determination that it was not “improper for the rate regulations as
    to rollbacks to take account of investment income on capital used and useful
    for providing insurance.” (20th Century, 
    supra,
     8 Cal.4th at p. 290.) The
    California Supreme Court was addressing the exclusion of “surplus surplus,”
    or surplus beyond what is used and useful to back up premiums, not the
    Commissioner’s discretion generally. (Id. at pp. 290-291.) And the fact that
    the Commissioner’s treatment of surplus in the rollback regulations may
    have been within his discretion does not imply his treatment of projected
    yield in a prior approval hearing regarding SFG is as well.12
    c.    “Insurance Company”
    We agree with the superior court that, on its face, section 1861.05(a)
    requires the Commissioner to use “the insurance company’s investment
    income,” not that of the company and its affiliates. (Emphasis added.) This
    interpretation is consistent with the precision implied by the preceding
    12     Along similar lines, we reject the Commissioner’s contention that SFG’s
    “ ‘actual’ reported investment income” would include “surplus surplus,” its
    exclusion benefits SFG, and this shows the “dangers” of focusing on rate
    components. It may well be that the Commissioner’s treatment of “surplus
    surplus” in the prior approval system is within his discretion too, but this
    still has no bearing on whether his calculation of projected yield is consistent
    with the statute.
    22
    phrase, “mathematically reflects.” It is also consistent with section 1861.05,
    subdivisions (b)-(d), which contain the procedural requirements for rate
    approval and repeatedly refer to the “insurer” and/or “applicant,” without
    reference to affiliates. (See § 1861.05, subd. (b) [“[e]very insurer which
    desires to change any rate shall file a complete rate application,” with certain
    specified data; placing burden on “applicant” to show rate is justified]; id.,
    subd. (c) [Commissioner “shall notify the public of any application by an
    insurer for a rate change”]; id., subd. (d)(2) [“extraordinary circumstances” for
    notice provisions include applications not resolved within deemed-approved
    180-day period, due to judicial proceeding involving application and “initiated
    by the applicant or an intervenor”].)13
    Appellants’ arguments are unavailing. First, they contend “company”
    is used broadly in the Insurance Code to include affiliates, citing a general
    provision addressing singular and plural references (§ 13); sections governing
    insurer examinations (§ 729, et seq.), and their purported incorporation by
    reference into Proposition 103; and reporting provisions (§§ 900, 923-924,
    935.4), including those referencing NAIC materials that they claim define
    “company” to include affiliates. They also cite a section allowing commonly-
    owned insurers to act as a single insurer (§ 1853.5). We address each in turn,
    and conclude none of these sections support Appellants’ interpretation.
    13     In addressing required application data, section 1861.05, subdivision
    (b) cites three other sections, but they have no bearing here. (§§ 1857.7,
    1857.9, 1864; § 1857.15 is also cited, but has been repealed.) None address
    affiliates, and the only mention of groups is in section 1857.9, a reporting
    provision that permits aggregate reports and incorporates by reference a
    statute requiring joint records in certain cases. (§ 1857.9, subds. (e), (j)
    [insurer can meet obligation consistent with § 1857, which requires
    reasonable records be maintained by insurer groups “engag[ing] in joint
    underwriting or joint reinsurance”].)
    23
    Section 13 states “[t]he singular number includes the plural . . . .”
    However, the section is a general provision under the Insurance Code, and
    the general provisions apply “[u]nless the context otherwise requires . . . .”
    (§ 5.) Even if “plural” could be construed to encompass “affiliates,” section
    1861.05(a) would still require “insurance company” to mean the applicant
    insurer, for the reasons discussed ante. (Cf. People v. Kunitz (2004) 
    122 Cal.App.4th 652
    , 655-656 [“language and structure” of statute at issue
    indicated general rule that “ ‘singular . . . includes the plural’ ” was “not
    intended to apply”].)
    Sections 729, et seq. contains provisions for Commissioner
    examinations. (§ 729 [definitions]; § 730 [authorizing Commissioner to
    conduct examinations, and generally requiring them every five years].)
    Section 729 defines terms “[a]s used in this article,” and states in part that
    “ ‘[c]ompany’ means any person engaging in . . . any . . . kind of insurance . . .
    business and any person or group of persons who may otherwise be subject to
    the . . . authority of the commissioner.” (§ 729, subd. (a).) It is in a different
    chapter and article from section 1861.05. (Compare § 729 [Division I, Part 2,
    Ch. 1, Art. 4], with § 1861.05 [Division I, Part 2, Ch. 9, Art. 10].) Section
    1860.3 does incorporate section 730, the substantive examination provisions,
    into the chapter in which Proposition 103 is codified (Ch. 9, Rates and Rating
    and other Organizations). But in addition to not actually incorporating
    section 729, section 1860.3 was enacted decades prior to Proposition 103 and
    the specific language of section 1861.05 would take precedence regardless.
    (§ 1860.3; added by Stats. 1947, ch. 805, p. 1907, § 1, amended by Stats. 1955,
    ch. 677, p. 1168, § 1; see State Dept. of Public Health v. Sup. Ct. (Ctr. for
    Investigative Reporting) (2015) 
    60 Cal.4th 940
    , 955 (Ctr. for Investigative
    Reporting) [“ ‘If conflicting statutes cannot be reconciled, later enactments
    24
    supersede earlier ones [citation], and more specific provisions take
    precedence over more general ones [citation].’ ”]; Code Civ. Proc., § 1859
    [“when a general and particular provision are inconsistent, the latter is
    paramount to the former”].)
    As for the reporting provisions, the financial statement requirements
    do not define insurer, or require insurers to include affiliate assets. (§ 900, et
    seq.) Nor do the NAIC materials establish otherwise, regardless of their
    required use under section 923. The NAIC instructions for the combined
    annual statement indicate that “wherever the word ‘company’ appears in the
    blank, it should be construed to mean ‘company and its affiliates’ ”—meaning,
    unsurprisingly, that in a form for combined reporting, company refers to the
    group. This provision has no bearing on the meaning of “insurance company”
    in section 1861.05(a). The own risk and solvency assessment (ORSA) rules
    (§ 935.1, et seq.) do have a definition section, but both that section and the
    substantive provisions separately address the “insurance group” and
    “insurer,” undermining any argument that the terms “insurer” or “insurance
    company” always imply affiliates as well. (See § 935.2, subds. (a)-(b)
    [defining “insurance group” and “insurer” by reference to § 1215, subds. (e)
    and (f) respectively]; § 1215, subds. (e), (f) [defining terms separately, and not
    defining insurer to include group]; § 935.4 [“an insurer, or the insurance
    group of which the insurer is a member, shall regularly conduct an ORSA”].)
    Section 1853.5 is of no aid to Appellants either. It provides “insurers
    having a common ownership . . . are hereby authorized to act in concert . . . as
    if they constituted a single insurer,” for purposes including ratemaking. The
    section allows insurers under common ownership to approach ratemaking as
    a group, but does not require this—much less support a presumption under
    the later-enacted, and more specific, section 1861.05 that will be treated as if
    25
    they did so. (Cf. Ctr. for Investigative Reporting, supra, 60 Cal.4th at p. 960
    [“later enactments supersede earlier ones”]; ibid. [specific statutes trump
    general ones].)
    Second, the Commissioner argues the California Supreme Court
    “upheld an enterprise-wide approach to . . . determining whether rates are
    confiscatory,” and Appellants note the Court stated the confiscation analysis
    “may implicate formulaic ratemaking [citation] using data reflecting the
    condition and performance of a group of regulated firms.” (20th Century,
    
    supra,
     8 Cal.4th at pp. 258, 293.) The Commissioner contends these methods
    are “equally acceptable for . . . calculating investment income.” We disagree.
    For one thing, the reference to an “enterprise-wide approach” was to the
    “regulated firm,” as distinguished from specific insurance lines. (See Id. at
    p. 258 [confiscation “ ‘is an enterprise-wide issue, not one to be parsed on a
    line-by-line basis’ ”]; id. at p. 293 [“confiscation is judged with an eye toward
    the regulated firm as an enterprise”].) More generally, even if enterprise- or
    group-wide approaches were “equally acceptable” for calculating investment
    income, this still would not aid Appellants. SFG does not contest the use of
    group-wide data, per se. Rather, they dispute it can be used for an insurer
    that does not share income with its group, an issue 20th Century did not
    address. (See California Building Industry Assn. v. State Water Resources
    Control Bd. (2018) 
    4 Cal.5th 1032
    , 1043 [“cases are not authority for
    propositions that are not considered”].)
    In sum, the text of section 1861.05(a) requires the Commissioner to use
    the applicant insurer’s actual projected investment income, precluding the
    use of group data that does not reflect such income.
    26
    2.    Statutory Scheme
    This interpretation is consistent with the broader statutory scheme.
    SFG and CW agree, and the Commissioner does not dispute, that the scheme
    implements a “total return” approach to ratemaking. As noted ante, the total
    return approach contemplates that if an insurer can earn profit from sources
    other than premiums—like investments—the premium that it can charge
    should be reduced. In turn, using the applicant insurer’s actual investment
    portfolio in the ratemaking process ensures that the income credited to the
    insurer for purposes of this offset is actually available to it, thus avoiding
    arbitrarily high or low rates.
    Accordingly, we disagree with CW that imposing requirements on the
    Commissioner’s consideration of investment income is inconsistent with the
    statutory scheme. Specifically, CW argues there is no “right way” to get
    “actual” numbers, as ratemaking is “inherently prospective” and “necessarily
    encompasses a normative dimension . . . .” Thus, CW posits, the question is
    not whether the Commissioner used the “actual” number for SFG’s future
    investment income, but whether he “selected from among the alternatives a
    reasonable way to reflect SFG’s future investment income . . . .” We disagree.
    There is no dispute prior approval ratemaking is prospective or that the
    Commissioner has discretion in administering the process, but he must do so
    within the limits of the statute. (ASIC, supra, 2 Cal.5th at p. 390; Poizner,
    supra, 180 Cal.App.4th at p. 1048.) And the statute requires him to use the
    insurer’s actual projected investment income—not to “select[] from among . . .
    [reasonable] alternatives.”14
    14    CW also asserts here that ratemaking “requires allocation of
    nationwide data to specific jurisdictions and lines of business.” To the extent
    CW suggests the statutory scheme requires the Commissioner to use group-
    27
    3.     Statutory Purposes
    Requiring use of the insurer’s actual projected investment income is
    also consistent with the purposes of Proposition 103.
    As noted ante, the initiative’s stated purpose is to “protect consumers
    from arbitrary insurance rates and practices, to encourage a competitive
    insurance marketplace, to provide for an accountable Commissioner, and to
    ensure that insurance is fair, available, and affordable for all Californians.”
    (Stats. 1988, § 2, p. A-276.) Thus, the objective is not just to keep insurance
    rates fair to consumers, but also to keep insurance available—which requires
    that rates be fair to the insurers as well. (See 20th Century, 
    supra,
     8 Cal.4th
    at p. 300 [“ultimate goal is the guaranty that ‘insurance is fair, available, and
    affordable for all Californians’ ”]; Spanish Speaking Citizens, supra, 85
    Cal.App.4th at p. 1226 [“We can conceive of no interpretation of ‘arbitrary
    insurance rates’ . . . as anything other than rates which do not reflect the cost
    of providing insurance”]; cf. Calfarm, supra, 48 Cal.3d at p. 821 [“[o]ver the
    long term the state must permit insurers a fair return”].) In contrast, SFG
    and amicus California Business Roundtable suggest imputing high-yield
    income to insurers with prudent investment strategies would impose an
    artificial price cap on rates, which could disincentivize such strategies and/or
    lead them to exit the market—thus limiting availability, to the detriment of
    consumers.
    Further, Proposition 103’s focus on fairness to both consumers and
    insurers is reflected in section 1861.05(a), itself, which bars both excessive
    and inadequate rates. (20th Century, 
    supra,
     8 Cal.4th at pp. 244-245
    [§ 1861.05(a)’s “general standard” for rates that are not “excessive,
    level data, this is inconsistent with its argument that the scheme leaves him
    free to exercise his discretion and is no more persuasive.
    28
    inadequate, [or] unfairly discriminatory” requires “fair and reasonable rates,”
    and the “range of fair and reasonable rates is defined in light of the insurer’s
    legitimate interest in financial integrity and the insured’s legitimate interest
    in freedom from exploitation”].)
    We therefore disagree with Appellants to the extent they suggest the
    goal of Proposition 103 was only to lower rates and prevent insurers from
    artificially raising them. Two related points also lack merit. Appellants
    contend Proposition 103 calls for liberal construal to promote its underlying
    purposes. (Prop. 103, § 8, subd. (a).) True, but those purposes extend beyond
    low rates. We also are not persuaded by CW’s argument that “[f]orcing
    consumers to pay excessive rates would frustrate the purpose of protecting
    consumers from arbitrary insurance rates.” The argument assumes SFG’s
    interpretation results in an excessive rate, which Appellants have not
    established.
    4.       Historical Context
    Finally, CW contends the historical context supports Appellants’
    position. CW explains it was an open question before Proposition 103 was
    enacted whether investment income would even be considered in setting
    rates, and that contemporaneous materials, including a NAIC report and a
    legislative report, reflect such consideration would be flexible. CW seeks
    judicial notice of these reports.
    Historical context can be relevant to statutory interpretation (Spanish
    Speaking Citizens, supra, 85 Cal.App.4th at p. 1214), but CW does not
    establish it sheds any light here. Even if CW were correct that the historical
    materials support flexibility in ratemaking generally, section 1861.05(a) uses
    specific language. It is the meaning of that language that is before us.
    29
    In turn, we decline to take judicial notice of the reports, as they are not
    relevant to disposition of this appeal. (Superior Court v. County of Mendocino
    (1996) 
    13 Cal.4th 45
    , 59, fn. 7 [denying judicial notice of irrelevant material].)
    Additionally, there is no indication the voters were presented with these
    reports, or even their subject matter. The ballot pamphlet, which is in the
    record, focused on reducing rates and imposing regulations—not ratemaking
    methodology. (See 20th Century, 
    supra,
     8 Cal.4th at pp. 269-270, fn. 8
    [denying notice of flyers “purportedly” distributed to voters during
    Proposition 103 campaign, because party failed to persuade court that
    contents may be noticed]; cf. Legislature v. Eu (1991) 
    54 Cal.3d 492
    , 504-505
    [appropriate to consider ballot pamphlets presented to voters in determining
    meaning of proposition].)
    C.    Regulation section 2644.20
    We now turn to the heart of this matter: whether the Commissioner’s
    interpretation and application of regulation section 2644.20 in SFG’s rate
    hearing was consistent with section 1861.05(a). We conclude it was not. We
    also reject Appellants’ arguments that the Commissioner’s interpretation of
    the regulation satisfies various objectives under Proposition 103 or warrants
    deference.
    1.     Regulation Language and Application
    Regulation section 2644.20, subdivision (a) states projected yield means
    the “weighted average yield . . . using the insurer’s actual portfolio,” and that
    the “weights shall be determined using the insurer’s most recent consolidated
    statutory annual statement.” Appellants maintain this language
    unambiguously and properly requires the Commissioner to use State Farm
    Group’s combined statement for SFG rate proceedings. SFG contends this
    interpretation and application of the regulation is internally inconsistent, as
    30
    there is no consolidated statement for SFG that reflects its actual portfolio,
    and that using the group’s statement violates section 1861.05(a)’s
    requirement that the rate reflect SFG’s investment income. We agree with
    SFG.
    We begin with the regulation language, and conclude it does not neatly
    apply to an insurer that either does not participate in a group, or does, but
    without pooling assets or income with other group members. “Actual” means
    “existing in fact or reality,” or “existing . . . at the time.” (Webster’s Dict., at
    p. 13.) “Portfolio,” in, this context, refers to “[t]he various securities or other
    investments held by an investor at any given time.” (Black’s Law Dictionary
    (9th ed. 2009) p. 1280; Webster’s Dict., at p. 967 [accord].) Thus, an insurer’s
    “actual portfolio” is the set of investments held by the insurer at that time.
    As for the phrase “consolidated statutory annual statement,” the statute only
    requires annual financial statements (§ 900); the combined group statement
    is a NAIC filing. For an insurer that pools assets within a group, the
    combined statement arguably could serve as a “consolidated statutory annual
    statement,” and it could reflect its actual portfolio. However, an insurer that
    does not pool assets, like SFG, does not have a “consolidated statutory annual
    statement” in any meaningful sense, and any group statement in which it
    participates reflects only the group’s portfolio—not its actual portfolio.
    Accordingly, in applying regulation section 2644.20 to an insurer like
    SFG, there are two options: (i) capture SFG’s actual portfolio by using its
    individual statement, and forego using a combined statement; or (ii) use
    State Farm Group’s combined annual statement and forego reflecting SFG’s
    actual portfolio. This brings us back to the statute, because only the first
    interpretation is consistent with section 1861.05(a). As discussed ante, the
    statute requires the Commissioner to use the insurance company’s actual
    31
    projected investment income, not some approximation thereof. (See ASIC,
    supra, 2 Cal.5th at p. 390 [regulation must fit within statutory authority];
    Poizner, supra, 180 Cal.App.4th at p. 1044 [accord].) The need to focus on the
    applicant insurer is particularly evident here, where the insurer and group
    have different asset portfolios, and asset distribution drives the projected
    yield calculation. (Reg. § 2644.20, subd. (a).) Accordingly, the
    Commissioner’s use of State Farm Group’s combined annual statement to
    calculate SFG’s projected yield violates section 1861.05(a).
    The Commissioner’s arguments to the contrary lack force. In the Rate
    Order, he found “no conflict between the terms ‘insurer’s actual portfolio’ and
    ‘consolidated statutory annual statement’ because Applicant’s consolidated
    annual statement is Applicant’s actual portfolio on a group basis.” CW
    echoes this argument here. But the regulation calls for the “insurer’s actual
    portfolio,” not the “insurer’s actual portfolio on a group basis.” (Reg.
    § 2644.20.) And, regardless, the statute still requires the rate to
    “mathematically reflect[]” the “insurance company’s investment income”—not
    that of the insurance company and its affiliates. (§ 1861.05(a).)
    The Commissioner further contends here that the regulation “defines
    ‘actual portfolio’ to mean the investments reported in the ‘insurer’s
    consolidated annual statement,’ ” noting the term “actual portfolio” does not
    appear in Proposition 103. But statutory interpretation aims to avoid
    rendering any words meaningless (Briggs, supra, 19 Cal.4th at p. 1118), and
    regardless of whether “actual portfolio” appears in the statute, the words
    have meaning. The Commissioner’s argument would render “actual portfolio”
    a nullity for insurers like SFG that lack a combined statement—and
    effectively leave him free to simply choose a statement for this purpose,
    which remains inconsistent with the statute. (Cf. State Farm Mut. Auto. Ins.
    32
    Co. v. Quackenbush (1999) 
    77 Cal.App.4th 65
    , 77 (Quackenbush) [“The
    Commissioner goes too far, however, when he asserts that ‘actual data’
    means ‘the right number,’ which allows him to judge whether the insurer
    used ‘a correct process’ when it determined its 1989 [allocated loss
    adjustment expenses] reserves. By no stretch can ‘actual’ be understood to
    mean ‘correctly determined.’ ”].)15
    SFG contends, and we agree, that the Commissioner’s interpretation is
    further undermined by his use of individual statements for insurers
    operating outside of groups.16 The Commissioner acknowledges he “has
    interpreted Regulation 2644.20 to permit the small minority of insurers that
    do not belong to a group to submit data from the only NAIC financial
    statements that include their data—their individual financial statements.”
    His explanation is that the truly individual insurers comprise a small part of
    the market; SFG is unique among large insurers for not pooling assets, and
    basically wants an exception; and he could reasonably draw the line for group
    data based on entities filing NAIC combined statements. This explanation
    turns not on the statutory or regulatory text, but on policy reasons for
    treating certain insurers differently, and lacks merit regardless. At the
    relevant time, SFG insured 20 percent of California homeowners, or one-fifth
    of the market. State Farm may have been the only large insurer not pooling
    15    CW suggests SFG is feigning confusion about what “consolidated
    statutory annual statement” refers to, noting it used group data in its prior
    rate application in 2013. Our understanding is that SFG disagrees with the
    Commissioner’s interpretation, not that it is confused by it, and Appellants
    do not establish any prior acquiescence by SFG is relevant.
    16  The individual insurers at the relevant time were Century National,
    Wawanesa, Golden Bear, Armed Forces Insurance Exchange, and California
    Mutual Insurance Company.
    33
    assets, but the Commissioner’s claim that SFG’s argument “does not apply to
    most of the industry” is somewhat misleading. The insurers not sharing
    assets do collectively comprise a large portion of the market.
    Appellants’ remaining arguments here lack merit. First, they dispute
    the relevance of the lack of a pooling arrangement. They argue SFG is
    controlled by State Farm Mutual, and State Farm investments are under
    common control. They also argue transactions between entities are
    permitted subject to “regulatory formalities” that amount to reporting
    requirements, citing section 1215.5, with CW even claiming State Farm
    Mutual “can, with a little paperwork, always change the corporate
    structures . . . .” And, they contend, State Farm’s investment managers can
    rebalance assets on the open market, regardless.17
    These arguments ignore corporate formalities and amount to
    speculation. (Cf. Mesler v. Bragg Management Co. (1985) 
    39 Cal.3d 290
    , 301
    [corporate form “will be disregarded only in narrowly defined circumstances
    and only when the ends of justice so require”]; Flocco v. State Farm Mut.
    Auto. Ins. Co. (D.C.App.2000) 
    752 A.2d 147
    , 155 [rejecting arguments that
    “State Farm Mutual and State Farm Fire [were] one and the same” and
    17     This is an appropriate juncture to address the record. SFG offered
    testimony about its structure and operations, some of which CW and the
    Department successfully excluded on relevance grounds. Some facts still
    came in, including through their own witnesses, and the Rate Order
    discussed them. Appellants cite some of this evidence to dispute SFG’s
    independent existence, while maintaining similar evidence proffered by SFG
    to illustrate that independence was properly excluded by the ALJ. Although
    we decline to reach SFG’s summary assertion that such exclusion was
    erroneous, we find Appellants’ approach to the evidence in this appeal
    unhelpful. To the extent facts are in the record, we consider them for all
    purposes.
    34
    challenging “separate corporate existence” of latter; noting status as wholly
    owned subsidiary did “not provide a sufficient basis for such a finding”].)
    State Farm assists with investment planning, but it is SFG’s investment
    committee that reviews the plan and its board that approves it. Appellants
    identify no affiliate transactions, “change[s] [to] the corporate structures,” or
    even “rebalanc[ing],” since SFG’s reorganization in 1998 to reflect
    intermingling of assets.
    Nor do Appellants accurately characterize affiliate transactions (much
    less corporate reorganizations, which typically require more than “a little
    paperwork”). Far from mere reporting requirements, the law imposes
    guidelines on such transactions and permits disapproval by the
    Commissioner; similar laws apply in Illinois, where SFG is domiciled. (See
    Fremont Indemnity Co. v. Fremont General Corp. (2007) 
    148 Cal.App.4th 97
    ,
    126 [§ 1215.5 provides “terms of transactions by insurers with their affiliates
    must be ‘fair and reasonable,’ . . . an insurer must notify the commissioner
    before entering into certain types of transactions, and . . . the commissioner
    may disapprove the transaction”]; cf. 215 ILCS 5/131.20 [standards for
    affiliate transactions]; 215 ILCS 5/131.20a [notification and disapproval
    provisions].)
    Second, Appellants argue SFG’s focus on projected yield runs afoul of
    regulation section 2646.4, subdivision (c), which they contend prohibits
    “piecemeal relitigation of the regulatory formula” in a rate hearing.
    Regulation section 2646.4, subdivision (c) bars “[r]elitigation . . . of a matter
    already determined either by these regulations or by a generic
    determination”; it permits evidence “relevant to . . . whether the rate is
    excessive or inadequate,” so long as not offered to relitigate the prohibited
    matters. (Cf. 20th Century, 
    supra,
     8 Cal.4th at p. 312 [effect of relitigation
    35
    bar is “simply to assure . . . the [ALJ] does not entertain the question whether
    the premises underlying the rate regulations as to rollbacks are sound”].)
    SFG does not dispute the validity of regulation section 2644.20, but rather,
    whether its application here was inconsistent with section 1861.05—a matter
    not resolved by the regulatory text and not involving a generic determination.
    Further, the dispute turns on statutory and regulatory interpretation, not
    obscure regulatory calculations beyond our purview, as Appellants suggest.
    (Compare 20th Century, at p. 293 [observing “ ‘economic judgments required
    in rate proceedings are often hopelessly complex and do not admit of a single
    correct result’ ”].) Indeed, the Rate Order itself suggests there are just two
    possible outcomes: a lower yield and higher maximum rate, using the
    numbers in SFG’s statement, or a higher yield and lower maximum rate,
    using State Farm Group’s combined statement.
    Finally, we disagree with the Commissioner that affirming the
    judgment effectively invalidates regulation section 2644.20. The superior
    court determined the regulation’s use of the insurer’s actual portfolio was
    consistent with the statute; it was the Commissioner’s “interpretation that
    the regulation allows him to use [State Farm Mutual’s] group yield instead of
    [SFG’s] investment income based on [SFG’s] actual portfolio” that was
    inconsistent. Accordingly, the judgment does not bar the Commissioner from
    continuing to use a combined annual statement for insurers that pool assets,
    which SFG concedes may comprise some of the market. And, of course, the
    Commissioner already uses individual statements for insurers without
    affiliates.
    2.     Regulatory Purposes
    Appellants contend that use of group-level data under regulation
    section 2644.20 advances the purposes of Proposition 103 by limiting rate
    36
    manipulation, ensuring accuracy, and improving manageability. Both the
    premises of this argument and its particulars lack merit with respect to SFG.
    As an initial matter, the purported objectives identified by Appellants
    rest on a statutory meaning and purpose we have rejected: that section
    1861.05(a) permits use of group-level data for insurers who do not pool assets
    and Proposition 103 was meant solely to keep rates low for consumers.
    Viewing such data as valid and necessary is a predicate to Appellants’
    concerns that groups may be engaging in rate manipulation, group data is
    always necessary to achieve accurate results, and capture of group data
    should be manageable. However laudable the Commissioner’s goals in trying
    to capture group-wide data, they cannot supplant the statutory meaning.
    (See, e.g., FDA v. Brown & Williamson Tobacco Corp. (2000) 
    529 U.S. 120
    ,
    161 [“no matter how ‘important, conspicuous, and controversial’ the issue, . . .
    an administrative agency’s power to regulate in the public interest must
    always be grounded in a valid grant of authority from [the legislature]”].)
    Appellants’ specific contentions also lack force.
    First, Appellants contend rate manipulation is a problem, explaining
    multi-state insurers have the incentive and the means to avoid recognition of
    investment income, such as by “artificially rais[ing] rates [through] altering
    corporate structures and investment holdings.” In turn, they contend, using
    group-level data reduces rate manipulation opportunities, consistent with the
    purposes of Proposition 103.
    These contentions resemble their claims about SFG’s purported lack of
    independence, and likewise amount to speculation. In essence, their position
    appears to be that any insurer group not openly sharing assets is doing so for
    nefarious purposes. For example, CW cites the Rate Order finding that
    insurers “may transfer assets between affiliates . . . as State Farm Mutual
    37
    undoubtedly did when it reconfigured SFG in 1998,” and suggests the goal
    was “to evade effective rate regulation,” not to manage risk. But regulation
    section 2644.20 did not require use of combined statements in 1998 (see
    discussion post), and CW does not explain how the reorganization was
    intended to avoid the regulation at the time. For similar reasons, we reject
    the Commissioner’s conjecture that if we affirm the judgment, “large insurers
    can be expected to move their California policies to corporate entities that
    hold only low-yield investments.” Appellants also note aspects of SFG’s
    relationship with its affiliates, including the shared services, reinsurance,
    and liquidity pool. But, again, they identify no evidence of asset sharing since
    1998, much less in a manner intended to avoid regulation.18
    Appellants also do not establish that limiting rate manipulation was a
    purpose of Proposition 103. They cite its purpose section, which reflects it
    was meant to ensure fair and reasonable rates, and the Commissioner’s broad
    discretion in adopting regulations to administer the initiative. But the
    initiative provided for the prior approval system, pursuant to which
    insurance companies can apply for rate changes and the Commissioner can
    review them—not the kind of open-ended enforcement power the
    Commissioner appears to be asserting.
    Second, Appellants contend that using group-level data is more
    accurate and reliable, noting other aspects of insurance regulation use group
    data and most insurers pool income. With respect to group data, they
    18    The Commissioner does contend that because SFG’s evidence was
    excluded, it has not proven there was no rate manipulation, and we lack the
    record to determine if there was. We reiterate our concern with Appellants’
    approach to the evidence in this appeal, and, either way, will not assume
    SFG manipulates rates because it allegedly has not shown otherwise.
    38
    contend risk management occurs on a group-wide basis and cite a Rate Order
    finding that focusing only on SFG “would not provide an accurate picture of
    the diversification of [its] investment risk . . . .” They also cite a finding by a
    rating organization that State Farm Group was “well diversified . . . .” But
    Appellants do not establish risk assessment and diversification are
    coextensive with income projection, and, regardless, section 1861.05(a) still
    requires use of the insurance company’s investment income.
    As for those insurers that do pool income, their prevalence does not
    compel a different result. There is no dispute regulations are “not invalid
    merely because they are to some extent underinclusive or overinclusive,” as
    the Commissioner asserts, but regulations still must be applied consistent
    with the authorizing statute. The cases the Commissioner cites are
    inapposite. (See Warden v. State Bar (1999) 
    21 Cal.4th 628
    , 633-634, 649,
    fn. 13 [rejecting argument that state bar MCLE exemptions violated equal
    protection, just because classifications might be imperfect]; Agric. Labor
    Relations Bd. v. Superior Court (1976) 
    16 Cal.3d 392
    , 410-411 [zoning plan is
    not “unconstitutional merely because certain property owners can show that
    it causes them unnecessary hardship”].)
    Third, Appellants contend use of group-level data improves
    manageability, by eliminating disputes over whether entities should be
    treated as groups and avoiding the need to examine corporate affairs and
    transactions. But their preceding arguments reflect they contemplate few, if
    any, good faith disputes; they simply assume group treatment is always
    valid, and they have not established this. Their specific contentions also lack
    merit. They contend the NAIC set an “objective standard” for determining if
    affiliates are sufficiently related to file a combined statement, thus
    eliminating disputes about group treatment. The purpose of the NAIC form
    39
    is to provide “combined data . . . for use by the NAIC in statistical research
    and analysis.” We are unconvinced that such a standard, objective or
    otherwise, can be dispositive of whether group assets reflect an “insurance
    company’s investment income” under section 1861.05(a). Appellants also
    note the Commissioner may adopt regulations to “reduce the job to
    manageable size . . . .” (Calfarm, supra, 48 Cal.3d at p. 824.) But the
    purported manageability concern only arises from the unfounded assumption
    that group treatment is always valid. Finally, the Commissioner argues use
    of group data leaves insurers “free to structure their businesses and allocate
    investments between corporate entities in whatever ways they find prudent,
    without those internal corporate decisions affecting their California rates.”
    Not so. Far from giving insurers flexibility, requisite use of group data could
    spur them to tailor their investment and business strategies—and to the
    detriment of consumers, as noted above.
    3.    Deference to Commissioner
    Appellants further contend we should also accept the Commissioner’s
    interpretation and application of regulation section 2644.20, because
    significant deference is due to him. We agree with the superior court that
    deference is not warranted here.
    a.    Applicable Law
    Additional legal background is helpful. There are two categories of
    administrative rules, quasi-legislative and interpretive. (Yamaha, 
    supra,
     19
    Cal.4th at p. 10.) A quasi-legislative rule “represents an authentic form of
    substantive lawmaking,” in which the “agency has been delegated the
    Legislature’s lawmaking power” and the scope of judicial review is narrow.
    (Ibid; Id. at pp. 10-11 [requiring quasi-legislative rules to come within
    designated authority, and be “reasonably necessary” to implement the
    40
    statutory purpose]; see ASIC, supra, 2 Cal.5th at pp. 396-397.) An
    interpretive rule “represents the agency’s view of the statute’s legal meaning
    and effect,” and “commands a commensurably lesser degree of judicial
    deference.” (Yamaha, at p. 11; ASIC, at p. 397 [court “must also consider
    whether the administrative interpretation is a proper construction of the
    statute”].)
    There are “two broad categories of factors relevant to a court’s
    assessment of the weight due an agency’s interpretation: those ‘indicating
    that the agency has a comparative interpretive advantage over the courts,’
    and those ‘indicating that the interpretation in question is probably correct.’ ”
    (Yamaha, 
    supra,
     19 Cal.4th at p. 12; see ASIC, supra, 2 Cal.5th at p. 390.)
    “In the first category are factors that ‘assume the agency has expertise
    and technical knowledge, especially where the legal text to be interpreted is
    technical, obscure, complex, open-ended, or entwined with issues of fact,
    policy, and discretion. A court is more likely to defer to an agency’s
    interpretation of its own regulation than to its interpretation of a statute,
    since the agency is likely to be intimately familiar with regulations it
    authored and sensitive to the practical implications of one interpretation over
    another.’ ” (Yamaha, 
    supra,
     19 Cal.4th at p. 12.)
    The “second group of factors . . . includes indications of careful
    consideration by senior agency officials . . . , evidence that the agency ‘has
    consistently maintained the interpretation in question, especially if [it] is
    long-standing’ . . . , and indications that the agency’s interpretation was
    contemporaneous with legislative enactment of the statute being
    interpreted.” (Yamaha, supra, 19 Cal.4th at pp. 12-13.) Further, “[i]f an
    agency has adopted an interpretive rule in accordance with Administrative
    Procedure Act provisions—which include procedures (e.g., notice to the public
    41
    of the proposed rule and opportunity for public comment) that enhance the
    accuracy and reliability of the resulting administrative ‘product’—that
    circumstance weighs in favor of judicial deference.”19 (Id. at p. 13.)
    b.    Analysis
    As an initial matter, Appellants contend regulation section 2644.20
    warrants great deference “because it is a quasi-legislative rule . . . .” But, as
    discussed ante, the validity of regulation section 2644.20 is not at issue here.
    Rather, the issue is whether the Commissioner’s interpretation of the
    regulation, as applied to SFG, is consistent with the statute, and we have
    concluded it is not. That lack of statutory consistency would render deference
    inappropriate, even if quasi-legislative principles applied. (See Yamaha,
    
    supra,
     19 Cal.4th at p. 11, fn. 4 [“even quasi-legislative rules are reviewed
    independently for consistency with controlling law”]; Quackenbush, supra, 77
    Cal.App.4th at p. 71, fn. 2 [“it is clear that the ‘quasi-legislative’ label does
    not insulate the Commissioner’s legal determinations from the usual level of
    judicial scrutiny any more than it protects his factual determinations”].)
    Turning to the factors impacting deference to agency interpretations,
    we begin first with agency expertise and knowledge. Although there is no
    19     We disagree with CW that courts must defer to an interpretation
    involving an agency’s “area of expertise” unless the “ ‘construction contradicts
    the clear language and purpose of the interpreted provision,’ ” for which it
    cites Hoitt v. Dept. of Rehabilitation (2012) 
    207 Cal.App.4th 513
    , 526. Hoitt is
    inapposite, and its view of the applicable legal standards has been rejected.
    (Ibid. [department properly interpreted regulations for vocational training
    reimbursement]; United Artists Theatre Circuit, Inc. v. Cal. Regional Water
    Quality Control Bd. (2019) 
    42 Cal.App.5th 851
    , 883-884 [rejecting similar
    language; “if taken literally,” it would “almost always require deference to
    any agency interpretation of an ambiguous statute,” which is “inconsistent
    with this court’s ‘ultimate responsibility for the construction of the
    statute’ ”].)
    42
    dispute regarding the Commissioner’s expertise here, it is not dispositive.
    Quackenbush is instructive. There, the Court of Appeal declined to defer to
    the Commissioner’s regulatory interpretation in affirming a mixed judgment
    that effectively precluded a rollback year refund. (Quackenbush, supra, 77
    Cal.App.4th at pp. 69, 71-72; ibid. [addressing treatment of loss adjustment
    expenses under regulation section 2643.6].) The Quackenbush court
    acknowledged it “must respect the Commissioner’s expertise,” noting this was
    a Yamaha factor, but found the second group of factors were “less helpful” to
    the Commissioner. (Quackenbush, at p. 75; id. at pp. 75-76 [interpretation
    was not contemporaneous with regulation’s enactment; this was “first
    contested case,” so one could not say Commissioner “consistently maintained”
    the interpretation; and stance could be viewed as a litigation position entitled
    to “substantial weight, but limited deference”].)
    Second, the Commissioner emphasizes regulation section 2644.20 was
    adopted “through a notice and comment procedure that mirrors the
    Administrative Procedure Act.” But deference is warranted for formally
    adopted rules because, in theory, they “include[] indications of careful
    consideration by senior agency officials.” (Yamaha, supra, 19 Cal.4th at
    p. 13; ibid. [“ ‘an interpretation of a statute contained in a regulation adopted
    after public notice and comment is more deserving of deference than [one]
    contained in an advice letter prepared by a single staff member’ ”].)
    Appellants identify nothing in the 2007 regulation revision process
    reflecting careful consideration of the disputed “consolidated statutory
    annual statement” language. Indeed, neither the Notice of Proposed
    Rulemaking nor Final Statement of Reasons discuss this language
    specifically, even though they do generally address changes to projected yield,
    including the use of the insurer’s actual portfolio. And when a public
    43
    commentator suggested consolidated statement data might be inappropriate
    in certain situations, the Commissioner simply referred the commentator to
    “other comments in this rulemaking file regarding use of combined data”—
    none of which addressed consolidated statements.20 For analogous reasons,
    we agree with SFG that the Commissioner’s effective disregard for the
    “actual portfolio” language in his regulatory interpretation arguments
    likewise does not “reflect the type of ‘thoroughness . . .’ and ‘validity
    of . . . reasoning’ that supports judicial deference.” (Yamaha, supra, 19
    Cal.4th at p. 14.)
    PacifiCare Life & Health Ins. Co. v. Jones (2018) 
    27 Cal.App.5th 391
    ,
    cited by the Commissioner, does not aid Appellants. In rejecting a facial
    challenge to a regulation under the Unfair Insurance Practices Act, the court
    there noted the Commissioner engaged in a formal rulemaking process and
    this “careful consideration,” along with his expertise, supported deference.
    (Id. at p. 417.) The present case involves application of a regulation, and
    there is no indication of careful consideration of the language at issue. (Cf.
    Spanish Speaking Citizens, supra, 85 Cal.App.4th at pp. 1186, 1195, 1198
    [regulations regarding automobile insurance rating factors were “adopted
    after years of study and debate,” including appointment of an “actuarial
    advisory committee” and release of an 18-month impact analysis].)
    20     The commentator’s specific concern was that “use of consolidated
    Annual Statement data is inappropriate where companies not admitted in
    California are included,” and “[i]f the non-admitted company writes a
    different mix of business from the admitted insurer, they will have a very
    differently distributed portfolio and the duration of the invested assets is
    likely to be different.” We grant SFG’s request for judicial notice of
    administrative materials regarding the Proposition 103 regulations. (Evid.
    Code, §§ 452, subd. (c), 459.)
    44
    Third, Appellants argue the Commissioner has consistently applied the
    current version of the regulation since its adoption in 2007, and SFG has
    identified no evidence of inconsistent treatment. The Commissioner also
    notes he is required to use a “single, consistent methodology,” and maintains
    he does so. (See Reg. § 2643.1 [“While companies remain free to formulate
    their rates under any methodology, the Commissioner’s review of those rates
    must use a single, consistent methodology.”].) But SFG has noted different
    treatment, for insurers without affiliates, and the Commissioner has
    acknowledged as much. Further, the present matter appears to be the first
    contested adjudication of the regulatory language at issue, casting doubt on
    the Commissioner’s ability to claim “consistent interpretation” at all. (See
    Quackenbush, supra, 77 Cal.App.4th at p. 76 [“Since . . . this is the first
    contested case to test the requirements of [regulation] section 2643.6, it
    cannot be said that the Commissioner had consistently maintained his
    interpretation.”].)21
    Moreover, our starting point is not 2007. The Commissioner first
    issued regulations under Proposition 103 in 1991, and between a minor
    revision the following year and 2007, projected yield was calculated using
    “imbedded yield” based on the insurer’s “net investment income”—with no
    reference to a “consolidated statutory annual statement.” (Register 92, No. 3,
    21    We reject CW’s claim that SFG previously admitted the Commissioner
    interpreted the regulation consistently. It cites a superior court brief in
    which SFG said it filed this case after “years of accepting the Commissioner’s
    interpretations in order to gain rate approvals without having to go to
    hearing.” SFG’s point appeared to be that it had avoided taking a position on
    the Commissioner’s view at all, to expedite rate approvals.
    45
    p. 728.30; Register 92, Nos. 15-17, p. 728.32].)22 The 2007 rulemaking file
    generally addressed reasons for the change, as noted above. But the point is
    there was a change, which not only underscores the lack of consistent
    application, but also reflects a lack of contemporaneous enactment. (Cf.
    Yamaha, supra, 19 Cal.4th at p. 13 [factors for deference include whether
    interpretation was “contemporaneous with legislative enactment of the
    statute being interpreted”].) Accordingly, we also reject any reliance by
    Appellants here on the Supreme Court’s approval of the Proposition 103
    regulatory framework in 20th Century, as the disputed regulatory language
    was not in effect at the time.23
    D.    Conclusion
    Having determined the Commissioner’s interpretation and application
    of regulation section 2644.20 is inconsistent with Insurance Code section
    1861.05(a), notwithstanding applicable principles of deference, we agree the
    superior court properly required the Rate Order to be set aside.
    22     The net investment income calculation called for “excluding capital
    gains, [and] divid[ing] by the average of the insurer’s . . . surplus and
    reserves.” (Former Cal. Code Regs., tit. 10, § 2644.20(a); Register 92, Nos. 15-
    17, p. 728.32.)
    23     SFG directs us to additional administrative materials that reflect an
    early focus on individual insurers, which it contends further illustrate the
    Commissioner’s position has vacillated. Although we already concluded as
    much, at least some of the materials are consistent with that conclusion.
    (See, e.g., Commissioner letter to Office of Admin. Law, 1992 [addressing
    importance of § 1861.05(a), and explaining a “crucial aspect” of ratemaking is
    that the insurers have use of the premiums]; Reg. § 2646.4 [titled “Hearings
    on Individual Insurers’ Rates” since Register 92, No. 3].)
    46
    II.    Retroactive Rate and Refund, and Cross-Appeal From Remand Order
    We now turn to the errors urged by SFG: that the Commissioner erred
    in ordering a retroactive rate and refund, and that the superior court erred in
    ordering a remand.24 We agree with SFG in both respects.
    A.     Commissioner’s Retroactive Rate Order
    SFG argues that under the prior approval system, it was required to
    pay the approved rate pending approval of a new one, thus precluding
    retroactive rates and related refunds. Appellants maintain the rate was not
    impermissibly retroactive, and the refund was proper regardless. We
    conclude the statutory prior approval requirement is prospective in operation
    and inconsistent with retroactive rates and refunds.
    1.    Applicable Law
    “[S]tatutes ordinarily are interpreted as operating prospectively in the
    absence of a clear indication of a contrary legislative intent.” (Quarry v. Doe I
    (2012) 
    53 Cal.4th 945
    , 955 (Quarry).)
    “In deciding whether the application of a law is prospective or
    retroactive, we look to function, not form. . . . Does the law ‘change[ ] the
    legal consequences of past conduct by imposing new or different liabilities
    based upon such conduct?’ [Citation.] Does it ‘substantially affect [ ] existing
    rights and obligations?’ [Citation.] If so, then application to a trial of
    preenactment conduct is forbidden, absent an express legislative intent to
    permit such retroactive application. If not, then application to a trial of
    24     As noted, the superior court did not reach the retroactive rate and
    refund issues, but the Commissioner agrees we should do so and CW
    impliedly agrees by acknowledging their relevance to remand. SFG appears
    to treat these issues both as further reason to affirm set aside of the Rate
    Order, and an argument against remand, thus implicating the appeal and
    cross-appeal. We group them with the cross-appeal for clarity.
    47
    preenactment conduct is permitted, because the application is prospective.”
    (Elsner v. Uveges (2004) 
    34 Cal.4th 915
    , 936-937; see Landgraf v. USI Film
    Products (1994) 
    511 U.S. 244
    , 280 [retroactive law increases “liability for past
    conduct”]; see, e.g., Californians for Disability Rights v. Mervyn’s, LLC (2006)
    
    39 Cal.4th 223
    , 231-232 [retroactive rules included “subject[ing] tobacco
    sellers to tort liability for acts performed” when “protect[ed] [by] an immunity
    statute,” while prospective rules included eliminating right under anti-
    SLAPP to “dismiss certain public-interest lawsuits”].)
    “[T]he presumption that legislation operates prospectively rather than
    retroactively is rooted in constitutional principles.” (Myers v. Philip Morris
    Companies, Inc. (2002) 
    28 Cal.4th 828
    , 841; see McClung v. Employment
    Development Dept. (2004) 
    34 Cal.4th 467
    , 475 [“[e]lementary considerations
    of fairness dictate that individuals should have an opportunity to know what
    the law is and to conform their conduct accordingly”].)
    “Ambiguous statutory language will not suffice to dispel the
    presumption against retroactivity; rather ‘ “a statute that is ambiguous with
    respect to retroactive application is construed . . . to be unambiguously
    prospective.” ’ ” (Quarry, supra, 53 Cal.4th at p. 955.)
    2.    Analysis
    a.    Statutory Language
    The prior approval requirement is set forth in section 1861.01,
    subdivision (c), and it is brief: “Commencing November 8, 1989, insurance
    rates subject to this chapter must be approved by the commissioner prior to
    their use.” The plain language of the statute thus requires that rates be set
    before their use, and apply prospectively.
    We disagree with Appellants that language in section 1861.05(a)—“[n]o
    rate shall be approved or remain in effect”—supports a different reading.
    48
    Construed in context, this language simply reflects that when a rate is
    reviewed and does not satisfy prior approval requirements (such as by being
    excessive), it will not go into effect or will no longer stay in effect. This is
    consistent with section 1861.01, subdivision (c)’s prospective orientation.
    Appellants’ suggestion that the terms “approved” and “remain in effect”
    represent prospective and retrospective options is not consistent with that
    orientation, and lacks merit regardless. Even if the interpretation were
    reasonable, it would simply render the phrase ambiguous and that is
    insufficient for retroactive application. (Quarry, supra, 53 Cal.4th at p. 955.)
    b.    Statutory Scheme
    Prospective application of prior approved rates also is consistent with
    the distinction between the prior approval period and the rollback year,
    which did incorporate retroactive refunds.
    As the California Supreme Court explained in 20th Century, the
    rollback year was a “temporary regulatory regime . . . evidently designed to
    allow the setting up of a permanent regulatory regime to follow . . . .” (20th
    Century, supra, 8 Cal.4th at p. 243.) The Court emphasized, “So far as the
    ratemaking formula functions in the rate rollback, . . . it has nothing to do
    with the ‘prior approval’ system. . . . That the two regimes are distinct is
    apparent in Proposition 103. It remains such in our construction of the
    initiative in Calfarm.” (20th Century, at pp. 288-289.)
    During the rollback year, an insurer who felt the 20 percent rollback
    was confiscatory could apply for higher rates and start charging them, but if
    the Commissioner later determined they were excessive, the insurer “had to
    refund with interest any premiums collected in excess of the rates ultimately
    approved.” (Calfarm, supra, 48 Cal.3d at p. 815; id. at p. 825 [elaborating
    that if application were filed during rollback, insurer could “begin charging
    49
    that higher rate pending approval,” while after that period, rates “must be
    approved by the commissioner prior to their use, but . . . the commissioner
    can approve an interim rate pending her final decision”; “[i]f the
    commissioner finds the initiative’s rate, or some other rate less than the
    insurer charged, is fair and reasonable, the insurer must refund excess
    premiums . . . with interest”].) The rollback regulations addressed refunds.
    (Reg. § 2645.3 [to “extent that the rates charged during the rollback period
    exceeded the minimum permitted earned premium, the excess shall be
    refunded to consumers with interest”]; Reg. § 2645.9 [amount of refund].)
    Refunds thus served a function during the rollback year: facilitating the
    temporary system in which insurers could charge non-approved rates
    pending approval. (See 20th Century, 
    supra,
     8 Cal.4th at p. 283 [insurers
    “were on notice that, in charging a higher rate [than the statutory rollback
    rate], they were proceeding at their own risk: they had to establish their
    entitlement to that rate”].)
    In contrast, the prior approval system requires insurers to charge prior
    approved rates, pending approval of new ones, so there is no comparable role
    for refunds. (§ 1861.01, subd. (c); Calfarm, supra, 48 Cal.3d at p. 825, fn. 17.)
    Nor do the regulations applicable to the prior approval system address
    refunds, in contrast to the rollback regulations. (See Ch. 5, subchapter 4.8
    generally, including article 6 [Procedures for Determination of Rates].)
    We reject Appellants’ suggestion that Calfarm and 20th Century
    support the use of refunds generally under Proposition 103. Those decisions
    concerned the substantive rate rollback, and the rollback regulations,
    respectively, and the Court took care to distinguish the prior approval period
    as a separate regime. (Calfarm, supra, 48 Cal.3d at p. 825 and fn. 17; 20th
    Century, 
    supra,
     8 Cal.4th at pp. 242-243, 288-289.) Mercury, cited by
    50
    Appellants, did not involve refunds and is otherwise distinguishable.
    (Mercury, supra, 8 Cal.App.5th at p. 589 [rejecting attempt to limit 20th
    Century’s “deep financial hardship” test for confiscation to rollback period,
    noting “[n]othing in the Supreme Court’s extended discussion . . . suggests
    that it would apply only to a retrospective price control rather than a
    prospective price control”].)
    c.     Case Law from Other Contexts
    We agree with SFG that authority from other contexts supports the
    conclusion that the retroactive rate and refund were impermissible. For
    example, in Bowen v. Georgetown University Hospital (1988) 
    488 U.S. 204
    (Bowen), the United States Supreme Court held the Secretary of Health and
    Human Services had no authority to issue retroactive Medicare cost-limit
    rules that required providers to return sums. (Id. at pp. 208-216.) The Court
    stated that “[e]ven where some substantial justification for retroactive
    rulemaking is presented, courts should be reluctant to find such authority
    absent an express statutory grant.” (Id. at pp. 208-209.) A rule against
    retroactive ratemaking in California’s public utility setting similarly
    “prevents [a regulator] from forcing a [regulated entity] to disgorge the
    proceeds of rates that have been finally approved and collected.” (The
    Ponderosa Telephone Co. v. Public Utilities Com. (2011) 
    197 Cal.App.4th 48
    ,
    62; see, e.g., Pacific Tel. & Tel. Co. v. Public Utilities Com. (1965) 
    62 Cal.2d 634
    , 649-650 [accord; striking refund order issued at end of rate
    investigation, for period of investigation].) We recognize these are different
    statutory and regulatory schemes, but other statutes can be instructive and
    these serve that role here. (See, e.g., Calfarm, supra, 48 Cal.3d at p. 825,
    fn. 16 [noting “analogous area of public utility regulation”].)
    51
    SFG also directs us to cases addressing the exclusivity of California
    rate approval proceedings, in which the courts reasoned, in part, that
    insurers are required to charge approved rates. (See Walker v. Allstate
    Indem. Co. (2000) 
    77 Cal.App.4th 750
    , 753 [“Once the commissioner’s decision
    is final, an insurer must charge only the approved rate”]; MacKay v. Superior
    Court (2010) 
    188 Cal.App.4th 1427
    , 1431 [casualty insurer “cannot charge a
    rate unless the rate is part of a rate plan which has been approved in
    advance”]; MacKay, at p. 1435, fn. 6 [“[a]n approved rate has the imprimatur
    of the [Department]; it has been approved as compliant with the law, to the
    best of the [Department]’s determination.”].) Contrary to Appellants’
    assertion, the significance of this reasoning is not diminished just because
    these cases arise in a different legal context or because that context continues
    to evolve. (See Villanueva v. Fidelity National Title Co. (2021) 
    11 Cal.5th 104
    , 110-111 [Commissioner did not have exclusive jurisdiction over claim
    that title insurer charged unauthorized rate].)
    d.    Appellants’ Remaining Arguments
    Appellants’ remaining arguments lack merit. First, we reject their
    reliance on the California Supreme Court’s observation in Calfarm that the
    Commissioner’s “power to grant interim relief . . . may fairly be implied” from
    the “remain in effect” language. (Calfarm, supra, 48 Cal.3d at p. 825.) The
    Court was addressing the rollback period, and specifically insurers’ ability to
    obtain relief for potentially confiscatory rates. (Ibid.) The “remain in effect”
    language could reasonably have a different interpretation in that context,
    where there were rates in use that had not yet been approved. Although the
    Court did allude to the possibility of interim relief in the prior approval
    period, it did so in terms of “interim rates” (Ibid.)—implying the use of a
    temporary rate, not, as we discuss post, mere notice that a refund might be
    52
    imposed in some amount (much less the “immediate[] reduct[ion]” the
    Commissioner now claims he could impose).
    Second, Appellants contend the refund actually was prospective, citing
    a discussion from 20th Century. That discussion, like the rest of the case,
    concerns the rollback period, and does not apply here. We explain. The
    Court observed that “rate regulations as to rollbacks may properly be
    considered prospective,” stating, in part: “The ordering of a refund of rates is
    ‘akin to a reduction in rates,’ when, as here, the rates in question were
    charged ‘pending a determination of [their] legality . . . .’ [Citations.] It
    follows that the ordering of a refund of rates is itself prospective.” (20th
    Century, supra, 
    8 Cal.4th at 281
    , italics added.) In the prior approval system,
    rates are not “pending a determination of . . . legality.” They have been
    approved.
    The Court then noted that even if the rollback regulations “might be
    deemed ‘retroactive,’ they cannot be deemed impermissibly so”—contrasting
    “primary retroactivity,” which impacts “past legal consequences of past
    actions,” with “ ‘[s]econdary’ retroactivity,” when regulations “affect[] the
    future legal consequences of past transactions . . . .” (20th Century, supra, 8
    Cal.4th at p. 281.) It found secondary retroactivity was present, but this was
    “an entirely lawful consequence of much agency rulemaking and does not by
    itself render a rule invalid.” (Id. at p. 282.) But rollback year refunds could
    be viewed as impacting future legal consequences, because the rates were not
    approved yet. In contrast, a refund order as to an approved rate would
    impact existing legal consequences. (See Bowen, 
    supra,
     488 U.S. at pp. 219-
    220 (conc. opn. of Scalia, J.) [providing examples; primary retroactivity
    includes change to “reimbursement . . . for already-provided Medicare
    services” and attempt to “recoup . . . funds” paid to hospitals, and secondary
    53
    retroactivity includes rule “that for . . . future income tax liability” treats
    previously nontaxable trusts as taxable, “rendering the previously
    established trusts less desirable in the future”].)25
    Third, Appellants cite the Werner ratemaking treatise to contend
    ratemaking is prospective when, as here, it is based on “past experience to
    estimate the premium needed for a prospective policy period,” whereas it
    would be retrospective if based on “actual experience during the policy
    period.” But the treatise focuses on ratemaking methodology generally, not
    retroactivity under California law. And, regardless, both prospective and
    retroactive ratemaking use data; the difference is what the data is used for.
    (See 20th Century, 
    supra,
     8 Cal.4th at p. 252 [“Because the ‘prior approval’
    system concerns rates for the future, its orientation is necessarily
    prospective. Hence, for review of rates thereunder, the ratemaking formula
    relies much on projections. [Citations.] [¶] By contrast, because the rate
    rollback concerns rates for a period that has passed, its orientation is
    retrospective. Hence, for review of rates thereunder, the ratemaking formula
    relies much on actual historical data.”].) To the extent the Commissioner
    25     We recognize the California Supreme Court distinguished Bowen in
    addressing the rollback year in 20th Century, but it expressed no opinion on
    its application to the prior approval system. (20th Century, 
    supra,
     8 Cal.4th
    at p. 282 [rejecting reliance on Bowen to argue rollback regulations were
    impermissibly retroactive, explaining the “Medicare cost-limit regulations”
    there “ ‘alt[ered] the past legal consequences of past actions’ under
    predecessor regulations”].) The Commissioner relatedly contends the Rate
    Order did not change the legal consequences of past conduct because
    regulation section 2644.20 has been in effect since 2007. He conflates the
    propriety of the order with its timing; SFG’s objection here is not to the rate
    determination itself, but to the effective date and refund.
    54
    used past data to impose a rate for a “period that has passed”—as he did
    here—the resulting order is retroactive. (Ibid.)
    Finally, Appellants contend the Notice of Hearing, issued June 22,
    2015, “provisionally advis[ed] [SFG] that its existing rates were excessive,
    and that it could be required to issue refunds on excess premiums collected
    after July 15, 2015.” The Commissioner contends, in turn, that SFG had
    options besides charging the prior approved rates during the rate hearing,
    including “approaching [him] for an interim rate order” that was consistent
    with the Notice of Hearing and stipulating to a lower rate. These arguments
    lack merit. The issue is not that SFG was unaware the Commissioner might
    order a refund; that much was plain from the notice (even if it was vague as
    to how much of a refund might be due). The issue is that SFG was required
    and entitled to charge the approved rate, until a different rate was approved.
    The purported alternatives would have forced SFG to concede the
    Commissioner’s position, at least during the hearing, and to forego the
    difference in premiums if SFG turned out to be correct. Nor do we find it
    relevant that SFG identified the July 15, 2015 date in its application, as CW
    notes. SFG unsuccessfully tried to update the date later, and it has
    consistently disputed the validity of a retroactive rate and refund.
    The cases cited by the Commissioner are of no assistance. In In re
    Marriage of Economou (1990) 
    224 Cal.App.3d 1466
    , the Court of Appeal
    affirmed an order requiring the husband to pay retroactive support, based on
    his fraudulent conduct. (Id. at p. 1477.) The court explained child support
    can be retroactive and spousal support is subject to modification, citing
    applicable statutes, and the family court had given notice retroactivity might
    be considered. (Id. at pp. 1477-1478.) Here, there is no legal basis for a
    retroactive refund in the first place. Pitts v. Perluss (1962) 
    58 Cal.2d 824
     is
    55
    likewise distinguishable. (Id. at pp. 827-828, 835 [regulation for
    unemployment compensation disability insurance not retroactive simply
    because it impacted existing plans; expressly noting no penalty “attaches to
    any past act” and companies just had to “discontinue . . . noncomplying plans
    or establish complying ones”].)26
    B.    Superior Court’s Remand Order
    In its cross-appeal, SFG argues the superior court erred by remanding
    to the Commissioner, as there is nothing left for him to determine. We agree.
    1.    Additional Facts
    In March 2018, the superior court entered its minute order setting
    aside the rate determination and remanding for further proceedings,
    including on the retroactive rate and refund issue. In May 2018, the
    Commissioner approved SFG’s application for a new rate, set to take effect on
    July 15, 2018. That July, SFG moved for reconsideration of the remand order
    under Code of Civil Procedure section 1008, subdivision (b), which the court
    denied on timeliness and other grounds. The court’s writ of mandate, issued
    with the judgment in February 2019, continued to direct the Commissioner to
    reconsider remanded issues.
    26    We briefly address two remaining points. First, we reject the
    Commissioner’s analogy to the judicial power to preserve the status quo
    pending decision; the issue is what he ordered after the rate hearing, not
    during it, and the case he cites is inapposite. (Cf. People ex rel. San Francisco
    Bay Conservation and Development Com. v. Emeryville (1968) 
    69 Cal.2d 533
    ,
    538 [deletion of procedural language from constitution did not limit Court’s
    inherent power to preserve jurisdiction with writ of supersedeas].) Second,
    SFG initially cited sections 1858.1 to 1858.3, and 1858.6, but withdrew its
    reliance on the former and did not discuss the latter in its reply brief. We
    need not address them.
    56
    2.    Analysis
    As a preliminary matter, it is unnecessary to resolve SFG’s argument
    that the superior court erred by denying its reconsideration motion. CW
    states the issue is irrelevant (while maintaining the court did not err),
    explaining remand can only be denied if the Commissioner lacked authority
    to set a retroactive rate. The Commissioner does not substantively address
    the reconsideration motion at all. We conclude the need for remand, if any, is
    independent of the reconsideration motion, and the record reflects no such
    need exists here.
    The propriety of administrative proceedings on remand turns on
    whether anything remains for determination by the agency. (See Tripp v.
    Swoap (1976) 
    17 Cal.3d 671
    , 677 [no need for remand regarding disability
    benefits, as there “was no issue remaining on which the trial court could
    invade the director’s discretion”], overruled on other grounds in Frink v. Prod
    (1982) 
    31 Cal.3d 166
    , 180; Ross Gen. Hosp., Inc. v. Lackner (1978) 
    83 Cal.App.3d 346
    , 354 [concluding hospital facility regulation was invalid as
    applied and directing department to issue certificate of exemption to hospital;
    when administrative record “requires as a matter of law that a particular
    determination be made, the court may order that the agency carry out its
    legal obligation”].)27
    27     (See In re Martinez (2012) 
    210 Cal.App.4th 800
    , 827 [“ ‘It is indeed a
    well-established principle of administrative law that an administrative
    agency vested with discretion to make a certain decision in the first instance
    may have its discretion limited on remand or even eliminated entirely by a
    reviewing court’ ”], citing In re Prather (2010) 
    50 Cal.4th 238
    , 259 (conc. opn.
    of Moreno, J.); cf. People v. Coelho (2001) 
    89 Cal.App.4th 861
    , 889 [“reviewing
    courts have consistently declined to remand cases where doing so would be an
    idle act that exalts form over substance”].)
    57
    Here, remand is unnecessary because no further rate determination is
    needed. There are three time periods: (i) from July 15, 2015, the rate
    commencement date under the Rate Order, through December 8, 2016, the
    date the Rate Order became effective; (ii) between December 8, 2016 and July
    15, 2018, the date SFG’s newly approved rate took effect, during which SFG
    charged rates consistent with the Rate Order; and (iii) after July 15, 2018.
    For the first period, we concluded above that the retroactive rate and related
    refund were invalid, obviating the need for recalculation. For the second
    period, SFG represents it cannot recover amounts lost due to applying the
    reduced rates, so there is also no need for recalculation. For the third period,
    SFG had obtained a rate increase in 2018, so there is nothing to recalculate
    there, either.
    Appellants’ arguments for remand are not persuasive. First, they
    argue remand is needed so the Commissioner can determine a rate and
    refund amount for the first period. This argument falls with our
    determination that the retroactive rate and refund were impermissible.
    Second, the Commissioner cites Code of Civil Procedure section 1094.5, which
    applies to administrative mandate matters, and argues the judgment “shall
    not limit or control in any way the discretion legally vested in the
    respondent.” (§ 1094.5, subd. (f).) No such limit is at issue here, because
    there is no discretion left to exercise. (Cf. Horwitz v. City of Los Angeles
    (2004) 
    124 Cal.App.4th 1344
    , 1355 [rejecting argument in zoning dispute that
    trial court erred by ordering city to revoke permits, rather than remanding;
    explaining there was “no discretion involved in the application of the formula
    to the measurements at issue” under the zoning ordinance].) Finally, the
    Commissioner states he designated the Rate Order as precedential, he “must
    . . . determine what to do” with it, and the “answer may not be as simple as
    58
    merely setting it aside.” He notes SFG did not challenge some issues and
    chose not to keep pursuing others, citing the catastrophe adjustment factor
    and leverage factor variance, respectively. But he does not argue these or
    any other issues should be precedential; instead, he summarily asserts he
    “needs to determine” this, without elaboration or authority. We are not
    persuaded.
    DISPOSITION
    The judgment is affirmed as to the superior court’s ruling that the
    Commissioner’s rate determination must be set aside. The judgment is
    reversed to the extent the superior court remanded to the Commissioner for
    further proceedings. The superior court is directed to enter a new and
    different judgment: (i) granting SFG’s petition for writ of administrative
    mandate; and (ii) directing the Commissioner to set aside the Rate Order in
    its entirety. SFG shall be awarded its costs on appeal.
    HUFFMAN, Acting P. J.
    WE CONCUR:
    GUERRERO, J.
    DO, J.
    59