Nrdc v. James Perry ( 2019 )


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  •                 FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    NATURAL RESOURCES DEFENSE             No. 18-15380
    COUNCIL, INC.; SIERRA CLUB;
    CONSUMER FEDERATION OF                  D.C. Nos.
    AMERICA; TEXAS RATEPAYERS’          3:17-cv-03404-VC
    ORGANIZATION TO SAVE                3:17-cv-03406-VC
    ENERGY; PEOPLE OF THE STATE
    OF CALIFORNIA, BY AND
    THROUGH ATTORNEY GENERAL
    XAVIER BECERRA; CALIFORNIA
    STATE ENERGY RESOURCES
    CONSERVATION AND
    DEVELOPMENT COMMISSION;
    STATE OF MARYLAND; STATE OF
    WASHINGTON; STATE OF MAINE;
    COMMONWEALTH OF
    MASSACHUSETTS; STATE OF
    VERMONT; STATE OF
    CONNECTICUT; COMMONWEALTH
    OF PENNSYLVANIA; DISTRICT OF
    COLUMBIA; STATE OF ILLINOIS;
    STATE OF NEW YORK; STATE OF
    OREGON; CITY OF NEW YORK;
    STATE OF MINNESOTA,
    Plaintiffs-Appellees,
    v.
    2                   NRDC V. PERRY
    JAMES R. PERRY, in his official
    capacity as Secretary of Energy;
    U.S. DEPARTMENT OF ENERGY,
    Defendants-Appellants,
    and
    AIR-CONDITIONING, HEATING, &
    REFRIGERATION INSTITUTE,
    Intervenor-Defendant.
    NATURAL RESOURCES DEFENSE             No. 18-15475
    COUNCIL, INC.; SIERRA CLUB;
    CONSUMER FEDERATION OF                  D.C. Nos.
    AMERICA; TEXAS RATEPAYERS’          3:17-cv-03404-VC
    ORGANIZATION TO SAVE                3:17-cv-03406-VC
    ENERGY; PEOPLE OF THE STATE
    OF CALIFORNIA, BY AND
    THROUGH ATTORNEY GENERAL               OPINION
    XAVIER BECERRA; CALIFORNIA
    STATE ENERGY RESOURCES
    CONSERVATION AND
    DEVELOPMENT COMMISSION;
    STATE OF MARYLAND; STATE OF
    WASHINGTON; STATE OF MAINE;
    COMMONWEALTH OF
    MASSACHUSETTS; STATE OF
    VERMONT; STATE OF
    CONNECTICUT; COMMONWEALTH
    OF PENNSYLVANIA; DISTRICT OF
    COLUMBIA; STATE OF ILLINOIS;
    STATE OF NEW YORK; STATE OF
    NRDC V. PERRY                               3
    OREGON; CITY OF NEW YORK;
    STATE OF MINNESOTA,
    Plaintiffs-Appellees,
    v.
    JAMES R. PERRY, in his official
    capacity as Secretary of Energy;
    U.S. DEPARTMENT OF ENERGY,
    Defendants,
    and
    AIR-CONDITIONING, HEATING, &
    REFRIGERATION INSTITUTE,
    Intervenor-Defendant-Appellant.
    Appeals from the United States District Court
    for the Northern District of California
    Vince Chhabria, District Judge, Presiding
    Argued and Submitted November 14, 2018
    San Francisco, California
    Filed October 10, 2019
    Before: Mary M. Schroeder and Paul J. Watford, Circuit
    Judges, and David A. Ezra, * District Judge.
    Opinion by Judge Watford
    *
    The Honorable David A. Ezra, United States District Judge for the
    District of Hawaii, sitting by designation.
    4                        NRDC V. PERRY
    SUMMARY **
    Department of Energy / Regulations
    The panel affirmed the district court’s order directing the
    U.S. Department of Energy (“DOE”) to publish four energy-
    conservation standards in the Federal Register.
    The district court agreed with the plaintiffs’ contention
    that a DOE regulation known as the “error-correction rule,”
    10 C.F.R. § 430.5, imposed upon DOE a non-discretionary
    duty to publish the standards in the Federal Register, and its
    refusal to do so violated the rule.
    The plaintiffs are a group of States and municipalities as
    well as several environmental and consumer organizations.
    They brought suit against DOE under the Energy Policy and
    Conservation Act (EPCA)’s citizen-suit provision.
    The panel rejected DOE’s challenges to the district
    court’s assertion of jurisdiction under 42 U.S.C.
    § 6305(a)(2). The panel held that DOE relinquished
    whatever discretion it might have had to withhold
    publication of the rules at issue when it adopted the error-
    correction rule. The panel further held that by delaying
    publication of the four rules beyond the period permitted
    under the error-correction rule, DOE violated the non-
    discretionary duty imposed by its own regulation. The panel
    also held that plaintiffs were not precluded from bringing the
    action under 42 U.S.C. § 6305(a)(2). The panel held that
    **
    This summary constitutes no part of the opinion of the court. It
    has been prepared by court staff for the convenience of the reader.
    NRDC V. PERRY                        5
    § 6305(a)(2) provided the necessary clear waiver of
    sovereign immunity from citizen suits predicated on a non-
    discretionary duty imposed either by statute or regulation.
    The panel held that the plaintiffs properly invoked
    EPCA’s citizen-suit provision to challenge DOE’s failure to
    perform is non-discretionary duty to submit the four rules at
    issue for publication in the Federal Register.
    COUNSEL
    H. Thomas Byron III (argued) and Mark B. Stern, Appellate
    Staff; Alex G. Tse, Acting United States Attorney; Civil
    Division, United States Department of Justice, Washington,
    D.C.; for Defendants-Appellants.
    Ian Fein (argued), Natural Resources Defense Council, San
    Francisco, California; Aaron Colangelo, Natural Resources
    Defense Council, Washington, D.C.; Daniel Carpenter-
    Gold, Natural Resources Defense Council, New York, New
    York; for Plaintiff-Appellee Natural Resources Defense
    Council, Inc.
    Timothy D. Ballo, Earthjustice, Washington, D.C., for
    Plaintiffs-Appellees Sierra Club, Consumer Federation of
    America, and Texas Ratepayers’ Organization to Save
    Energy.
    Somerset Perry (argued) and Jaime Jefferson, Deputy
    Attorneys General; Susan S. Fiering, Supervising Deputy
    Attorney General; Sally Magnani, Senior Assistant Attorney
    General; Office of the Attorney General, Oakland,
    California; Bryant B. Cannon, Deputy Attorney General;
    Xavier Becerra, Attorney General; Office of the Attorney
    6                     NRDC V. PERRY
    General, San Francisco, California; Lisa Kwong and
    Timothy Hoffman, Assistant Attorneys General; Patrick A.
    Woods, Assistant Solicitor General; Environmental
    Protection Bureau, Office of the Attorney General, Albany,
    New York; George Jepsen, Attorney General; Robert Snook
    and Matthew Levine, Assistant Attorneys General; Office of
    the Attorney General, Hartford, Connecticut; Lisa Madigan,
    Attorney General; Gerald T. Karr, Assistant Attorney
    General; Attorney General’s Office, Chicago, Illinois; Janet
    T. Mills, Attorney General; Susan P. Herman, Deputy
    Attorney General; Office of the Attorney General, Augusta,
    Maine; Brian E. Frosh, Attorney General; Steven M.
    Sullivan, Solicitor General; Office of the Attorney General,
    Baltimore, Maryland; Maura Healey, Attorney General;
    Shennan Kavanaugh and I. Andrew Goldberg, Assistant
    Attorneys General; Office of the Attorney General, Boston,
    Massachusetts; Max Kieley, Assistant Attorney General,
    Office of the Attorney General, St. Paul, Minnesota; Ellen F.
    Rosenblum, Attorney General; Benjamin Gutman, Solicitor
    General; Denise G. Fjordbeck, Attorney-in-Charge, Civil
    Administrative Appeals; Jesse Ratcliffe, Assistant Attorney
    General; Natural Resources Section, Oregon Department of
    Justice, Salem, Oregon; Josh Shapiro, Attorney General;
    Michael J. Fischer, Chief Deputy Attorney General; Office
    of the Attorney General, Harrisburg, Pennsylvania; Thomas
    J. Donovan Jr., Attorney General; Julio A. Thompson and
    Laura B. Murphy, Assistant Attorneys General; Attorney
    General’s Office, Montpelier, Vermont; Bob Ferguson,
    Attorney General; Laura J. Watson, Senior Assistant
    Attorney General; Office of the Attorney General, Olympia,
    Washington; Karl A. Racine, Attorney General; Loren L.
    AliKhan, Solicitor General; Office of the Attorney General,
    Washington, D.C.; Zachary W. Carter, Corporation Counsel;
    Susan E. Amron, Chief, Environmental Law Division; Haley
    Stein, Counsel; New York City Law Department, New York,
    NRDC V. PERRY                        7
    New York; for Plaintiffs-Appellees People of the State of
    California, California State Energy Resources Conservation
    and Development Commission, State of New York, State of
    Connecticut, State of Illinois, State of Maine, State of
    Maryland, State of Massachusetts, State of Minnesota, State
    of Oregon, State of Pennsylvania, State of Vermont, State of
    Washington, District of Columbia, and City of New York.
    Stuart Drake and C. Harker Rhodes IV, Kirkland & Ellis
    LLP, Washington, D.C.; Mark E. McKane and Austin L.
    Klar, Kirkland & Ellis LLP, San Francisco, California; for
    Intervenor-Defendant-Appellant.
    OPINION
    WATFORD, Circuit Judge:
    These appeals arise from consolidated actions brought
    by plaintiffs who seek to compel the United States
    Department of Energy (DOE) to promulgate four energy-
    conservation standards. The standards received final
    approval by DOE at the end of the Administration of
    President Obama, but thus far, under the Administration of
    President Trump, DOE has declined to promulgate them.
    The plaintiffs contend that a DOE regulation known as the
    “error-correction rule,” 10 C.F.R. § 430.5, imposes upon
    DOE a non-discretionary duty to publish the standards in the
    Federal Register, and that its refusal to do so violates the
    rule. The district court agreed and issued an order directing
    DOE to publish the four standards in the Federal Register.
    Natural Resources Defense Council, Inc. v. Perry,
    
    302 F. Supp. 3d 1094
    (N.D. Cal. 2018). We stayed that
    order pending resolution of DOE’s appeal.
    8                     NRDC V. PERRY
    Although both sides have advanced compelling
    arguments in support of their respective positions, we find
    the plaintiffs’ arguments more persuasive. We therefore
    affirm the district court’s decision.
    I
    A
    We begin with an overview of the statutory and
    regulatory framework. As relevant here, the Energy Policy
    and Conservation Act (EPCA), 42 U.S.C. §§ 6291–6317,
    authorizes DOE to establish energy-conservation standards
    for certain consumer products and industrial equipment.
    DOE establishes or amends energy-conservation standards
    through      formal     notice-and-comment        rulemaking
    proceedings. §§ 6306(a), 6316(a). An energy-conservation
    standard is promulgated when DOE publishes a final rule
    prescribing the standard in the Federal Register.
    A somewhat unusual provision of EPCA, known as the
    “anti-backsliding” provision, prohibits DOE from
    promulgating an amended standard that is less stringent than
    the       preexisting      standard.            §§ 6295(o)(1),
    6313(a)(6)(B)(iii)(I); see Natural Resources Defense
    Council v. Abraham, 
    355 F.3d 179
    , 187 (2d Cir. 2004). As
    DOE discovered during litigation in the Fifth Circuit, if a
    standard contains inadvertent errors, the anti-backsliding
    provision can make it difficult to correct those errors after
    the final rule establishing the standard has been published in
    the Federal Register.
    In 2016, DOE sought to address this problem by
    adopting the error-correction rule. The rule creates a brief,
    45-day window between DOE’s issuance of a final rule
    establishing an energy-conservation standard and the rule’s
    NRDC V. PERRY                         9
    publication in the Federal Register. During that 45-day
    period, DOE posts the rule on its website and invites
    members of the public to identify any errors that should be
    corrected before the standard is promulgated. 10 C.F.R.
    § 430.5(c)(1), (d)(1). The error-correction rule defines the
    term “error” narrowly as “an aspect of the regulatory text of
    a rule that is inconsistent with what the Secretary intended
    regarding the rule at the time of posting,” and gives as
    examples typographical, calculation, or numbering
    mistakes. § 430.5(b). Requests for correction may not be
    premised on “disagreement with a policy choice that the
    Secretary has made,” and DOE will not consider any new
    evidence submitted in connection with a correction request.
    § 430.5(d)(2)–(3). As DOE explained, the error-correction
    process is not an opportunity to “seek to reopen issues that
    DOE has already addressed or argue for policy choices
    different from those reflected in the final rule.”
    Establishment of Procedures for Requests for Correction of
    Errors in Rules, 81 Fed. Reg. 26,998, 26,999 (May 5, 2016).
    The error-correction rule provides that, after the 45-day
    period ends, the Secretary of Energy “may respond to a
    request for correction . . . or address an Error discovered on
    the Secretary’s own initiative by submitting to the Office of
    the Federal Register either a corrected rule or the rule as
    previously posted.” 10 C.F.R. § 430.5(e). The error-
    correction rule addresses each of the three scenarios that can
    arise upon completion of the error-correction process, and
    specifies timeframes within which the Secretary “will”
    submit the final rule for publication in the Federal Register:
    (f) Publication in the Federal Register.
    (1) If, after receiving one or more
    properly filed requests for correction, the
    10                    NRDC V. PERRY
    Secretary decides not to undertake any
    corrections, the Secretary will submit the rule
    for publication as it was posted pursuant to
    paragraph (c)(1) of this section.
    (2) If the Secretary receives no properly
    filed requests after posting a rule and
    identifies no Errors on the Secretary’s own
    initiative, the Secretary will in due course
    submit the rule, as it was posted pursuant to
    paragraph (c)(1) of this section, to the Office
    of the Federal Register for publication. This
    will occur after the [45-day] period
    prescribed by paragraph (c)(2) of this section
    has elapsed.
    (3) If the Secretary receives a properly
    filed request after posting a rule pursuant to
    (c)(1) and determines that a correction is
    necessary, the Secretary will, absent
    extenuating circumstances, submit a
    corrected rule for publication in the Federal
    Register within 30 days after the period
    prescribed by paragraph (c)(2) of this section
    has elapsed.
    § 430.5(f)(1)–(3) (emphasis added).
    B
    With that background in mind, we can turn to the facts
    giving rise to this dispute. In December 2016, after lengthy
    rulemaking proceedings, DOE finalized the four energy-
    conservation standards at issue by posting on its website
    final rules prescribing the standards. Each standard covers a
    different set of products: portable air conditioners,
    NRDC V. PERRY                               11
    commercial packaged boilers, uninterruptible power
    supplies, and air compressors. Each of the final rules was
    signed by the appropriate DOE official and states that “[t]he
    Secretary of Energy has approved publication of this final
    rule.” The 45-day error-correction period ended on January
    19, 2017, for the rule governing air compressors, and on
    February 11, 2017, for the rules governing the other three
    products.
    DOE received one minor correction request relating to
    the rule for commercial packaged boilers (changing the
    symbol “>” to “≥” in a table), and no correction requests for
    the remaining three rules. Nevertheless, after the 45-day
    error-correction period ended, DOE refused to submit any of
    the rules to the Office of the Federal Register for publication.
    It still has not done so, informing us in its brief and at oral
    argument that the agency “is continuing to review” the rules.
    The plaintiffs are a group of States and municipalities as
    well as several environmental and consumer organizations.
    They brought suit against DOE under EPCA’s citizen-suit
    provision, which, as relevant here, authorizes any person to
    bring a civil action against an agency such as DOE “where
    there is an alleged failure of such agency to perform an act
    or duty under this part which is not discretionary.” 42 U.S.C.
    § 6305(a)(2). 1 The plaintiffs allege that the error-correction
    rule imposes upon DOE a non-discretionary duty to publish
    the four rules at issue in the Federal Register.
    1
    Section 6305(a)(2) provides: “Except as otherwise provided in
    subsection (b) of this section, any person may commence a civil action
    against . . . any Federal agency which has a responsibility under this part
    where there is an alleged failure of such agency to perform any act or
    duty under this part which is not discretionary.”
    12                    NRDC V. PERRY
    The district court denied DOE’s motion to dismiss the
    action and granted the plaintiffs’ motion for summary
    judgment. The court held that it had jurisdiction to hear the
    suit under § 6305(a)(2). That provision, the court concluded,
    authorizes suits for enforcement of non-discretionary duties
    imposed by regulations such as the error-correction rule; the
    court rejected the government’s argument that the
    provision’s scope is limited to duties imposed by 
    statute. 302 F. Supp. 3d at 1097
    . The court also concluded that the
    error-correction rule imposes upon DOE a non-discretionary
    duty to publish the four rules at issue, and that DOE has
    violated that duty by withholding publication. 
    Id. at 1100–
    01. The court accordingly ordered DOE to publish the four
    rules in the Federal Register within 28 days.
    II
    On appeal, DOE renews its challenges to the district
    court’s assertion of jurisdiction under 42 U.S.C.
    § 6305(a)(2). DOE contends that the error-correction rule
    does not impose a mandatory duty to publish final rules in
    the Federal Register upon completion of the error-correction
    process. And it contends that, even if the error-correction
    rule imposes such a duty, the plaintiffs cannot invoke
    § 6305(a)(2) because that provision only authorizes suits for
    the enforcement of non-discretionary duties imposed by
    statute. Like the district court, we reject both of these
    arguments.
    A
    To invoke the district court’s jurisdiction under
    § 6305(a)(2), the plaintiffs must identify a failure by DOE to
    perform an act or duty “which is not discretionary.”
    42 U.S.C. § 6305(a)(2). They contend that DOE had a non-
    discretionary duty to publish the four rules at issue upon
    NRDC V. PERRY                        13
    completion of the error-correction process. In asserting such
    a duty, the plaintiffs acknowledge that, ordinarily, agencies
    are free to withdraw a proposed rule before it has been
    published in the Federal Register, even if the rule has
    received final agency approval. See Kennecott Utah Copper
    Corp. v. U.S. Department of Interior, 
    88 F.3d 1191
    , 1206
    (D.C. Cir. 1996); Anne Joseph O’Connell, Agency
    Rulemakings and Political Transitions, 105 Nw. U. L. Rev.
    471, 529 (2011). Indeed, regulations governing the Office
    of the Federal Register generally permit an agency to
    withdraw a final rule even after it has been submitted to the
    Office for publication, so long as the rule has not yet been
    published. 1 C.F.R. § 18.13(a); see 
    Kennecott, 88 F.3d at 1206
    . In Kennecott, the D.C. Circuit held that an agency
    could withdraw regulations that were submitted to the Office
    of the Federal Register at any time up until the regulations
    were made available for public 
    inspection. 88 F.3d at 1205
    –
    06. The government urges us to reach the same conclusion
    here. But the regulations at issue in Kennecott were never
    made available for public inspection with the expectation
    that they would become final, as the rules here were. And,
    of course, there could have been no argument in Kennecott
    that the agency had a mandatory duty to publish the
    regulations due to anything similar to the error-correction
    rule.
    The district court held that DOE relinquished whatever
    discretion it might have had to withhold publication of the
    rules at issue here when it adopted the error-correction 
    rule. 302 F. Supp. 3d at 1098
    . We think the plain language of the
    error-correction rule supports that reading, and that the
    absence of genuine ambiguity in the rule’s meaning
    precludes us from deferring to DOE’s contrary
    interpretation. See Kisor v. Wilkie, 
    139 S. Ct. 2400
    , 2415
    (2019).
    14                       NRDC V. PERRY
    The error-correction rule states that, at the end of the
    error-correction process, the Secretary “will” submit the
    final rule for publication in the Federal Register. 10 C.F.R.
    § 430.5(f)(1)–(3). The word “will,” like the word “shall,” is
    a mandatory term, see Washington v. Harper, 
    494 U.S. 210
    ,
    221 (1990), unless something about the context in which the
    word is used indicates otherwise. See Webber v. Crabtree,
    
    158 F.3d 460
    , 461 (9th Cir. 1998) (per curiam). We see
    nothing in the rule’s text or regulatory history to suggest that
    the word “will” was meant to carry anything other than its
    ordinary, mandatory connotation here.
    Section 430.5(f), titled “Publication in the Federal
    Register,” is the most relevant provision. It addresses each
    of the possible scenarios that could arise at the end of the
    error-correction process: (1) no requests for correction are
    received and the Secretary identifies no errors on his own;
    (2) a request for correction is received but the Secretary
    decides not to make any corrections; or (3) a request for
    correction is received and the Secretary decides that a
    correction is warranted. In each of those scenarios,
    § 430.5(f) states without qualification that the Secretary
    “will submit the rule for publication,” “will in due course
    submit the rule for publication,” or “will, absent extenuating
    circumstances, submit a corrected rule for publication in the
    Federal Register within 30 days.” 10 C.F.R. § 430.5(f)(1)–
    (3). 2 In adopting the error-correction rule, DOE reiterated
    the binding nature of these provisions: “The error correction
    rule prescribes a timeline under which DOE will submit a
    2
    DOE has made clear that the phrase “absent extenuating
    circumstances” in subsection (f)(3) qualifies the 30-day timeframe for
    publication, not the duty to publish itself. See Notice of Partial Grant
    and Partial Denial of Petitions to Amend the Error Correction Rule,
    81 Fed. Reg. 57,745, 57,750 (Aug. 24, 2016).
    NRDC V. PERRY                         15
    rule to the Office of the Federal Register for publication.”
    Notice of Partial Grant and Partial Denial of Petitions to
    Amend the Error Correction Rule, 81 Fed. Reg. 57,745,
    57,750 (Aug. 24, 2016) (emphasis added).
    Given the mandatory character of these pronouncements,
    it would be unnatural to read the word “will” in § 430.5(f) to
    mean “may.” Although § 430.5(e) states that “[t]he
    Secretary may respond to a request for correction . . . or
    address an Error discovered on the Secretary’s own
    initiative,” even that provision makes clear that the
    Secretary’s response is limited to one of two options:
    “submitting to the Office of the Federal Register either a
    corrected rule or the rule as previously posted.” 10 C.F.R.
    § 430.5(e) (emphasis added). We thus agree with the district
    court’s observation that, “once the Department has posted an
    energy standard for error correction and the time to submit
    requests for correction has passed, subsection (f) of the Rule
    gives the Department only two options: publish the standard
    as posted, or correct any errors in the standard and publish it
    as 
    corrected.” 302 F. Supp. 3d at 1098
    .
    DOE nonetheless contends that, as used in § 430.5(f), the
    word “will” was intended to be merely descriptive rather
    than prescriptive. DOE reads § 430.5(f) as describing what
    the agency anticipates will ordinarily occur at the end of the
    error-correction process, leaving the Secretary free to do
    something different if he so chooses. We do not think that
    is a plausible reading of the provision’s language. As the
    plaintiffs point out, when the word “will” is used elsewhere
    in the error-correction rule, it is used in its mandatory sense,
    to prescribe what the agency is required (or forbidden) to do.
    For example, § 430.5(c) states that the Secretary “will cause
    a rule under the Act to be posted on a publicly-accessible
    Web site” to commence the error-correction process, and
    16                     NRDC V. PERRY
    that the Secretary “will not submit a rule for publication in
    the Federal Register” during the 45-day period that follows.
    10 C.F.R. § 430.5(c)(1)–(2). DOE does not claim that these
    provisions are merely descriptive of ordinary practice, or
    that the Secretary is free to ignore their commands. Indeed,
    in the one instance where the error-correction rule clearly
    does seek to describe what the agency anticipates will
    ordinarily occur, rather than to prescribe a required action,
    the rule says exactly that: “[T]he Secretary will ordinarily
    designate an effective date for a rule under this section that
    is no less than 30 days after the publication of the rule in the
    Federal Register.” § 430.5(f)(5) (emphasis added).
    DOE argues that we should not read the error-correction
    rule as imposing a non-discretionary duty to publish because
    the rule does not explicitly divest the Secretary of the
    discretion he would otherwise possess to withdraw a final
    rule prior to publication. We confronted and rejected a
    similar argument in Sacks v. Office of Foreign Assets
    Control, 
    466 F.3d 764
    (9th Cir. 2006). There, the Office of
    Foreign Assets Control (OFAC) adopted a regulation stating
    that if the agency imposed a penalty that remained unpaid
    after 30 days, “the matter shall be referred to the United
    States Department of Justice for appropriate action to
    recover the penalty in a civil suit in a Federal district court.”
    
    Id. at 778
    (quoting 31 C.F.R. § 575.705 (2002)). OFAC
    argued that, because the regulation was silent about using
    private collection agencies, it retained the discretion to refer
    collection matters to them rather than to the Department of
    Justice. We labeled that argument “patently absurd.” 
    Id. at 780.
    We held that the regulation’s use of the word “shall”
    unambiguously imposed “a mandatory duty that is not
    subject to discretion.” 
    Id. at 778
    . And we refused to require
    that an agency “articulate all of the acts the agency may not
    engage in simply to guarantee that mandatory prescriptions
    NRDC V. PERRY                         17
    are followed.” 
    Id. at 780.
    That reasoning applies with equal
    force to the error-correction rule. In our view, the rule’s use
    of the word “will” unambiguously imposes a mandatory duty
    that constrains whatever discretion the Secretary might
    otherwise have possessed.
    We find DOE’s remaining argument unpersuasive. It is
    true that the error-correction rule does not set date-certain
    deadlines by which the Secretary must submit a rule for
    publication after the 45-day error-correction period ends.
    However, we do not think that fact renders the duty to
    publish discretionary. Section 430.5(f)(3) states that when
    the agency decides a correction is warranted, the Secretary
    will generally submit the corrected rule for publication
    within 30 days, “absent extenuating circumstances.”
    10 C.F.R. § 430.5(f)(3). That general 30-day deadline
    informs the interpretation of subsections (f)(1) and (f)(2),
    which apply when the agency decides not to make any
    corrections. Those provisions state that the Secretary will
    submit the rule for publication as it was originally posted,
    either without specifying any timeframe for doing so (when
    a request for correction is received but not acted upon) or “in
    due course” (when no requests for correction are received).
    § 430.5(f)(1)–(2). In either scenario, though, 30 days would
    necessarily mark the outer limit for performing the
    ministerial task of submitting the original rule for
    publication, because the agency bound itself to submit a
    corrected rule within that timeframe in all but unusual
    circumstances.
    Here, the Secretary had a non-discretionary duty to
    submit all four rules for publication in the Federal Register
    within 30 days after the error-correction process ended.
    DOE received a request for correction as to only one of the
    rules, and the agency has not claimed that extenuating
    18                    NRDC V. PERRY
    circumstances precluded it from resolving that request
    within the normal 30-day timeframe. As to the other three
    rules for which no requests were received, the Secretary was
    required to submit the original rule for publication “in due
    course,” § 430.5(f)(2), a period that elapsed at the latest
    30 days after the 45-day error-correction period ended. By
    delaying publication of the four rules beyond the period
    permitted under the error-correction rule, DOE has violated
    the non-discretionary duty imposed by its own regulation.
    B
    DOE next argues that, even if the error-correction rule
    imposes upon it a non-discretionary duty to publish, the
    plaintiffs are still precluded from bringing this action under
    42 U.S.C. § 6305(a)(2). That is so, the agency asserts,
    because the provision requires the plaintiffs to identify an
    alleged failure by DOE to perform an “act or duty under this
    part,” meaning Part A of Subchapter III, Chapter 77
    (42 U.S.C. §§ 6291–6309). In the agency’s view, the phrase
    “under this part” refers solely to duties imposed by statute,
    not to duties imposed by regulations such as the error-
    correction rule.
    We do not find DOE’s reading of § 6305(a)(2)
    convincing. As we read it, the phrase “under this part”
    encompasses duties imposed by statute and regulation alike,
    so long as the regulation in question was issued under Part
    A of Subchapter III. It is undisputed that DOE promulgated
    the error-correction rule under the authority granted to it by
    Part A. See Establishment of Procedures for Requests for
    Correction of Errors in Rules, 81 Fed. Reg. at 27,005
    (“Authority: 42 U.S.C. §§ 6291–6309; 28 U.S.C. § 2461
    note.”).
    NRDC V. PERRY                        19
    DOE’s reading of § 6305(a)(2) as limited to statutory
    duties is unconvincing for several reasons. First, throughout
    EPCA, Congress consistently used the phrase “under this
    part” or “under this section” when referring to requirements
    established by regulation. For example, EPCA refers to
    energy-conservation standards “prescribed under this part,”
    42 U.S.C. § 6302(a)(5); final rules “published under this
    part,” § 6295(n)(5)(B); and test procedures prescribed
    “under this section,” § 6314(b). In contrast, when Congress
    wanted to refer only to statutory provisions, it used distinct
    phrases such as “of this part” or “established in.” For
    example, EPCA authorizes the Secretary and the Federal
    Trade Commission to “issue such rules as each deems
    necessary to carry out the provisions of this part.” § 6298
    (emphasis added).         And § 6302 refers to energy-
    conservation standards “established in or prescribed under
    this part,” to distinguish between standards imposed by
    statute and those imposed by regulation. § 6302(a)(5)
    (emphasis added). This consistent pattern supports the view
    that Congress used the phrase “under this part” to include
    regulatory obligations.       See Sierra Club v. Leavitt,
    
    355 F. Supp. 2d 544
    , 556–57 (D.D.C. 2005) (reaching the
    same conclusion with respect to the Clean Air Act’s
    materially identical citizen-suit provision).
    Second, other than § 6305(a)(2), DOE has not identified
    a single provision in which Congress supposedly used the
    phrase “under this part” to refer exclusively to statutory
    provisions. The plaintiffs, on the other hand, have identified
    at least one other provision of EPCA that would be rendered
    nonsensical if we adopted DOE’s reading of the phrase. In
    § 6309, Congress authorized the appropriation of specific
    sums to the Secretary for fiscal years 1976–1979 “to carry
    out his responsibilities under this part.” 42 U.S.C § 6309(a)
    (emphasis added). DOE has not explained why, under its
    20                    NRDC V. PERRY
    reading, Congress would have authorized the Secretary to
    spend the appropriated funds to carry out his statutory
    responsibilities but not his regulatory responsibilities.
    Third, far from supporting DOE’s reading of
    § 6305(a)(2), we think the language of a neighboring
    subsection, § 6305(a)(1), confirms that the phrase “under
    this part” encompasses regulatory duties. Section 6305(a)(1)
    authorizes citizen suits against “any manufacturer or private
    labeler who is alleged to be in violation of any provision of
    this part or any rule under this part.” 42 U.S.C. § 6305(a)(1).
    DOE asks us to contrast subsection (a)(1)’s use of the phrase
    “any rule under this part” with subsection (a)(2)’s use of the
    phrase “any act or duty under this part,” and to conclude that
    Congress must have intended to exclude regulatory duties
    from the sweep of (a)(2) because (a)(2) does not mention
    “rules.” We do not think that conclusion follows at all. The
    key phrase in both provisions is “under this part”: Just as
    rules are “under this part” because they are established
    through regulations promulgated under the authority of Part
    A, so too with duties. Indeed, the language of subsection
    (a)(1) itself reinforces the pattern discussed earlier, with
    Congress using the phrase “of this part” to refer solely to
    statutory provisions, and the phrase “under this part” when
    referring to regulatory obligations.
    DOE relies on Kucana v. Holder, 
    558 U.S. 233
    (2010),
    to support its position, but in our view that case is readily
    distinguishable. In Kucana, the Supreme Court interpreted
    a provision that precluded judicial review of any decision by
    the Attorney General “the authority for which is specified
    under this subchapter” to be in the discretion of the Attorney
    General. 8 U.S.C. § 1252(a)(2)(B)(ii) (emphasis added).
    The Court held that this provision barred judicial review
    only of “determinations made discretionary by statute,” not
    NRDC V. PERRY                      21
    those “declared discretionary by the Attorney General
    himself through 
    regulation.” 558 U.S. at 237
    . But none of
    the reasons the Court gave for reaching that conclusion
    applies to the statute before us. The Court in Kucana
    stressed that § 1252(a)(2)(B) is “sandwiched between” two
    other subsections that contain only statutory references,
    leading one to “expect that it, too, would cover statutory
    provisions alone.” 
    Id. at 246.
    In addition, the Court noted
    that the statute had been enacted against the well-settled
    “presumption favoring judicial review of administrative
    action,” which requires clear and convincing evidence to
    dislodge. 
    Id. at 251–52.
    Finally, the Court emphasized, as
    a “paramount factor” in its decision, the separation-of-
    powers concerns that would have been raised by construing
    the statute to allow the Attorney General to place his own
    decisions beyond judicial review “simply by issuing a
    regulation declaring those decisions ‘discretionary.’” 
    Id. at 237,
    252. DOE does not contend that any of these
    considerations should (or could) drive the interpretation of
    the statute at issue here.
    We hold that § 6305(a)(2) provides the necessary “clear
    and unequivocal waiver” of sovereign immunity from
    citizen suits predicated on a non-discretionary duty imposed
    either by statute or regulation. U.S. Department of Energy
    v. Ohio, 
    503 U.S. 607
    , 619 (1992). The plaintiffs therefore
    properly invoked EPCA’s citizen-suit provision to challenge
    DOE’s failure to perform its non-discretionary duty to
    submit the four rules at issue for publication in the Federal
    Register.
    *         *          *
    The unopposed motion for judicial notice filed by
    Intervenor Air-Conditioning, Heating, and Refrigeration
    Institute is GRANTED. Upon issuance of the mandate from
    22                    NRDC V. PERRY
    this court, the stay entered on April 11, 2018 (Dkt. 42 in Case
    No. 18-15380; Dkt. 38 in Case No. 18-15475), is
    DISSOLVED.
    AFFIRMED.