Bp Exploration & Production Inc. v. United States ( 2020 )


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  •            In the United States Court of Federal Claims
    No. 18-972C
    (Filed: March 18, 2020)
    )
    BP EXPLORATION & PRODUCTION                   )     Suit to recover leasehold royalty
    INC.,                                         )     overpayments and interest; Federal Oil
    )     and Gas Royalty Management Act, 30
    Plaintiff,              )     U.S.C. §§ 1701-59, as amended by the
    )     Federal Oil and Gas Royalty
    v.                                     )     Simplification and Fairness Act and the
    )     Fixing America’s Surface
    UNITED STATES,                                )     Transportation Act of 2015; statutory
    )     interpretation; Federal Savings Statute, 1
    Defendant,              )     U.S.C. § 109
    )
    )
    Jonathan A. Hunter, Jones Walker LLP, New Orleans, Louisiana, for plaintiff. With him
    on the briefs was Sarah Y. Dicharry, Jones Walker LLP, New Orleans, Louisiana.
    Tanya B. Koenig, Trial Attorney, Commercial Litigation Branch, Civil Division, United
    States Department of Justice, Washington, D.C., for defendant. With her on the briefs were
    Joseph H. Hunt, Assistant Attorney General, Civil Division, and Robert E. Kirschman, Jr.,
    Director, and Allison Kidd-Miller, Assistant Director, Commercial Litigation Branch, Civil
    Division, United States Department of Justice, Washington, D.C. Of counsel was David
    Kearney, Attorney-Advisor, Rocky Mountain Regional Solicitor’s Office, United States
    Department of the Interior, Lakewood, Colorado.
    OPINION AND ORDER
    LETTOW, Senior Judge.
    Plaintiff BP Exploration & Production, Inc. (“BP”) has brought suit against the United
    States (the “government”) acting through the Department of the Interior’s Office of Natural
    Resources Revenue (“ONRR”) to recover overpayments of royalties made to the government
    pursuant to lease agreements on oil and gas leases in the Gulf of Mexico. The government
    refunded some, but not all, of the overpaid royalties claimed by BP and refused to pay interest on
    the amount refunded. This dispute turns on dueling interpretations of complex, interrelated
    sections of Title 30 of the United States Code concerning royalty disputes, specifically those
    adopted as part of the Federal Oil and Gas Royalty Management Act of 1982 (“Royalty
    Management Act”), Pub. L. No. 97-451, 96 Stat. 2447 (codified at 30 U.S.C. § 1701-59), as
    amended by the Federal Oil and Gas Royalty Simplification and Fairness Act (“Royalty
    Simplification Act”), Pub. L. No. 104-185, 110 Stat. 1700 (1996).
    On April 8, 2019, the court denied the government’s motion for dismissal on
    jurisdictional grounds and set a legal framework for consideration of the merits. See generally
    BP Expl. & Prod., Inc. v. United States, 
    142 Fed. Cl. 579
    (2019). The United States then filed
    the administrative record on July 22, 2019, see ECF No. 30, and BP subsequently filed a motion
    for judgment on the administrative record, see Pl.’s Mot. for Judgment on the Admin. R. (“Pl.’s
    Mot.”), ECF No. 37. The issues have been fully briefed, see Def.’s Resp. and Cross-Mot. for
    Judgment on the Admin. R. (“Def.’s Cross-Mot.”), ECF No. 42; Pl.’s Reply & Resp. to Def.’s
    Mot. (“Pl.’s Resp.”), ECF No. 43; Def.’s Reply to Pl.’s Resp. (“Def.’s Reply”), ECF No. 44, and
    the court held a hearing on March 3, 2020.
    The court concludes that BP timely filed its claim because the seven-year statute of
    limitations set out at 30 U.S.C. § 1724(b)(1) governs here. And, because the amendments related
    to interest in Fixing America’s Surface Transportation Act of 2015 (“FAST Act”), Pub. L. No.
    114-94, Div. C, Title XXXII, § 32301, 129 Stat. 1312, do not apply retroactively and did not
    curtail the accrual of interest on preexisting obligations, BP is also entitled to collect the interest
    that accrued from the time BP made its overpayments until those payments were or are refunded.
    Accordingly, BP’s motion for judgment on the administrative record is GRANTED and the
    government’s cross-motion is DENIED.
    FACTS1
    A. The Royalty Payment Audit
    BP and the United States are party to lease agreements pertaining to oil and gas fields
    situated in the Gulf of Mexico, and pursuant to those agreements, BP is obligated to pay the
    United States royalties in proportion to the value of oil and gas it produces from those fields. See
    Def.’s Cross-Mot. at 5. Regulations promulgated by ONRR authorized BP to reduce the value of
    oil and gas produced, and thus the amount of royalties owed, by deducting allowable expenses,
    including some costs relating to transportation infrastructure and operation. Id.; Pl.’s Mot. at 9-
    10.
    The Royalty Management Act vested the Department of the Interior with authority to
    “implement and maintain a royalty management system for oil and gas leases.” 30 U.S.C. §
    1701(b)(2). Subsequently, the Royalty Simplification Act added procedures for conducting
    audits and requesting corrections of overpayments and underpayments. See Pub. L. 104-185,
    110 Stat. 1700. The latter Act also set a limitation on the amount of time for the agency to issue
    a final decision on demands by lessees. See 
    id. The Royalty
    Simplification Act authorized
    lessees to recover interest on overpayment refunds, but that provision was repealed nearly two
    decades later by the enactment of the FAST Act § 32301.
    On February 7, 2009, ONRR initiated “an audit of transportation allowances deducted
    from royalties paid on [f]ederal offshore properties transported through [BP’s] Na Kika Subsea
    1
    The recitations that follow constitute findings of fact by the court from the
    administrative record filed pursuant to Rule 52.1(a) of the Rules of the Court of Federal Claims
    (“RCFC”).
    2
    Complex” during the 2006 calendar year. AR 2-3.2 In the course of that audit, ONRR expanded
    its scope to include the period January 1, 2004 through December 31, 2007 and to cover
    additional BP properties. AR 49-399. The transportation allowances BP had reported on a
    monthly basis for these periods were estimations, and BP intended to revise its original filings
    within the applicable adjustment period to include costs that it had not previously deducted. See
    AR 57-564. Throughout the course of the audit, BP communicated to ONRR’s auditors that it
    intended to include these additional costs in the transportation allowances. AR 57-564. Because
    such adjustments were anticipated during the audit, some increasing and others decreasing the
    amount of the allowance, the parties agreed that BP would wait to submit formal adjustment
    requests until both sides had consulted and agreed on the necessary alterations, thereby
    streamlining the process. AR 57-573.
    The Royalty Management Act imposes limitations on the periods in which the
    government and BP may seek corrections to past royalty payments. See 30 U.S.C. §§
    1721a(a)(4) (setting a six-year adjustment period),3 1724(b)(1) (setting a seven-year limitation
    period).4 The statute also permits the government and a lessee to toll the applicable period by a
    2
    The administrative record is consecutively paginated, and citations to the record are
    cited by tab and page as “AR __-__.”
    3
    Paragraph 1721a(a)(4) provides:
    (4) For purposes of this section, the adjustment period for any obligation shall be the
    six-year period following the date on which an obligation became due. The
    adjustment period shall be suspended, tolled, extended, enlarged, or terminated by
    the same actions as the limitation period in section 1724 of this title.
    30 U.S.C. § 1721a(a)(4).
    4
    Subsection 1724(b) provides:
    (b) Limitation period
    (1) In general
    A judicial proceeding or demand which arises from, or relates to an
    obligation, shall be commenced within seven years from the date on which the
    obligation becomes due and if not so commenced shall be barred. If
    commencement of a judicial proceeding or demand for an obligation is barred
    by this section, the Secretary, a delegated State, or a lessee or its designee (A)
    shall not take any other or further action regarding that obligation, including
    (but not limited to) the issuance of any order, request, demand or other
    communication seeking any document, accounting, determination, calculation,
    recalculation, payment, principal, interest, assessment, or penalty or the
    initiation, pursuit or completion of an audit with respect to that obligation; and
    (B) shall not pursue any other equitable or legal remedy, whether under statute
    3
    written agreement. 30 U.S.C. §§ 1721a(a)(4), 1724(d). Between 2010 and 2013, BP and ONRR
    executed a series of seven agreements tolling statutes of limitations, including those in Paragraph
    1721a(a)(4) and Subsection 1724(d). See generally AR 9. Executed November 19, 2010, the
    first agreement applied to the Na Kika properties and tolled the period from November 1, 2003
    through December 31, 2010. AR 9-45. The second, third, fourth, and sixth agreements covered
    the so-called “Deepwater Properties” (which collectively refers to a series of different properties
    subject to BP leases) from January 1, 2004, see AR 9-46, through February 15, 2014, see AR 9-
    53.5 The fifth and seventh agreements covered the Mad Dog property from April 1, 2006, see
    AR 9-52, through February 15, 2014, see AR 9-55. In sum, the agreements tolled the statute of
    limitations for the Na Kika properties from November 1, 2003 through February 15, 2014; the
    Deepwater Properties from January 1, 2004 through February 15, 2014; and the Mad Dog
    property from April 1, 2006 through February 15, 2014. None of the agreements included the
    Mica property. AR 71-1123.
    ONRR notified BP via email on July 13, 2013 that it was closing the audit and would
    send BP the audit report. See AR 35-360. Issued on November 18, 2013, the report summarized
    ONRR’s conclusions concerning BP’s underpayments and directed BP to “complete and
    report/adjust transportation allowance[s] for Na Kika from January 2008 forward and for other
    Federal Offshore Deepwater properties from January 2004 forward.” AR 57-753. After issuing
    the audit report, ONRR continued to make inquiries about audit-related matters as late as June
    2014, see, e.g., AR 57-583, leading BP to assert that the audit proceeded until at least that time,
    see Pl.’s Mot. at 14.
    B. BP’s Refund Demands
    In August 2013, before ONRR issued the audit report, the auditors informed BP that they
    interpreted the tolling agreements to operate in a one-sided fashion by extending the time for
    ONRR to recover royalty underpayments but not the time for BP to recover overpayments. See
    AR 57-579. Although the ONRR Director would later reject this interpretation of the tolling
    agreements, the communication engendered concerns for BP that its right to overpayment
    refunds could end up being time-barred, leading to BP’s decision to submit two refund demands
    outside of the audit process. See Pl.’s Mot. at 14. On November 13, 2013, BP sent a letter to the
    Secretary of the Interior and the Director of ONRR demanding a refund of $6,955,581.89 plus
    interest for royalty overpayments related to the Na Kika and Holstein properties for January 2004
    or common law, with respect to an action on or an enforcement of said
    obligation.
    30 U.S.C. § 1724(b) (emphasis added).
    5
    Several of the tolling agreements covering the Deepwater Properties clarify the precise
    properties included within that collective grouping by furnishing an attachment containing a
    listing of the individual properties and related lease identification numbers. See, e.g., AR 9-51.
    Encompassed within the Deepwater Properties are the Na Kika properties and the Holstein
    property, but the Mad Dog and Mica properties are not among the Deepwater Properties. See
    AR 9-51.
    4
    through August 2007. See AR 51-438, 442. BP sent a second letter on February 12, 2014,
    demanding a refund of $6,619,730.51 plus interest for royalty overpayments for January 2004
    through December 2007. See AR 52-453. The leases at issue in the second demand included
    several Deepwater Properties, the Mad Dog and Mica properties, and additional refunds
    attributable to the Holstein property. See AR 52-458. The refunds BP demanded related to
    deductible transportation costs that had not been previously deducted but were identified
    although not addressed during the audit. AR 57-580 to 581. Both letters stated that they should
    be considered “a formal ‘demand’ for purposes of 30 U.S.C. §§ 1721a(b)(1)(A) and 1724(b)(1).”
    AR 51-438; AR 52-453.
    In February and June 2014, ONRR sent letters partially granting BP’s refund demands
    but denying them insofar as they included costs incurred outside a statute of limitations. See
    generally AR 54; AR 55. ONRR never disputed that the costs in question qualified as deductible
    transportation costs, only that some of the demands were untimely. AR 57-581. Declining to
    concede the effectiveness of the tolling agreements in preserving those claims, ONRR asserted
    that the agreements only operated in favor of the government’s claims for underpayments and
    would therefore not preserve BP’s claims for overpayments. See AR 54-478; AR 55-507.
    Applying the seven-year period specified in Section 1724(b), ONRR concluded that BP could
    only receive refunds for overpayments made within seven years of its demand. See AR 54-478;
    AR 55-507.
    Accordingly, ONRR denied refunds for costs incurred more than seven years from the
    dates of BP’s requests but granted those within that time. See AR 54-478; AR 55-507.
    Therefore, regarding BP’s November 2013 claim covering the Na Kika and Holstein properties,
    ONRR granted refunds for October 2006 through August 2007, but rejected refunds covering
    January 2004 through September 2006. AR 54-475. Regarding BP’s February 2014 claim for
    the Deepwater, Holstein, Mad Dog, and Mica properties, ONRR granted refunds for January
    2007 through December 2007, but rejected refunds for January 2004 through December 2006.
    AR 55-503. In total, ONRR refunded BP $5,556,497.32 of the $13,575,312.40 claimed, plus
    interest. AR 74-1161. BP appealed the decision to the ONRR Director in October 2014. See
    AR 74.
    C. The Appeal to the Director of ONRR
    Three years after BP filed its appeal, on December 11, 2017, the ONRR Director issued a
    decision granting partial relief. See AR 71-1118. While the decision resulted in a net benefit for
    BP, it reversed some of the relief that had been granted by ONRR’s initial decision. First, the
    Director rejected ONRR’s one-sided interpretation of the tolling agreements, concluding that the
    agreements bilaterally preserved both ONRR’s ability to demand payment of royalties and BP’s
    ability to request refunds. See AR 71-1127 to 1128. Second, under that bilateral interpretation
    of the tolling agreements, the Director then addressed which of the two limiting time periods
    applied to BP’s refund demands. Recognizing the effect of adopting one period over the other,
    he noted that BP’s demands “would be timely for all months if subject to the seven-year
    limitation period in 30 U.S.C. § 1724(b)(1) . . . . [, b]ut if the six-year adjustment period . . .
    applies, some months would still be untimely.” AR 71-1128.
    5
    Reversing ONRR’s initial decision, the Director concluded that the pertinent statute of
    limitations was not the seven-year limitation period of Paragraph 1724(b)(1) but the six-year
    adjustment period of Paragraph 1721a(a)(4). See AR 71-1131. That conclusion rested on the
    premise that “[t]o allow all lessee refund requests as long as the request was within seven years
    after the obligation becomes due would render § 1721a superfluous and meaningless.” AR 71-
    1129 (emphasis in original). Instead, the Director reasoned that “a lessee may request a refund
    after the six-year adjustment period, as extended by any tolling agreement, only if it meets the
    requirements outlined in § 1721a(a)(3).” AR 71-1129. (emphasis in original). That paragraph
    contains three requirements: (1) the lessee must provide written notice to the Secretary; (2) the
    request must be made during an audit of the period which includes the production month for
    which the adjustment is made; and (3) the Secretary must approve the request. See 30 U.S.C. §
    1721a(a)(3).6 The Director rejected BP’s position that the audit extended well into 2014, noting
    that the government’s requests for information after it notified BP that it was closing the audit in
    July 2013 simply sought to verify corrections BP had provided during the audit. See AR 71-
    1131. Accordingly, the Director concluded that because BP’s November 2013 and February
    2014 demands occurred after the audit closed in July 2013, it “did not meet § 1721a(a)(3)’s
    requirement that any refund request submitted after the adjustment period be made during an
    audit of the production month at issue.” AR 71-1130 to 1131. Having ruled that the seven-year
    period did not apply to BP’s refund demands, the Director applied the six-year period, finding
    ineligible for refund the first five months of the Na Kika demand, the first nine months of the
    2013 Holstein demand, and the first twelve months of the Deepwater Properties demand. AR
    71-1134. Additionally, the remaining months previously excluded by the unilateral
    interpretation of the tolling agreements were now deemed eligible, see AR 71-1128, and the
    Director accordingly granted a refund of $6,736,368, leaving $1,282,447 not refunded, see BP
    Expl. & Prod., 
    Inc., 142 Fed. Cl. at 587
    . Notably, had the seven-year period rather than the six-
    year period been applied, the remaining $1,282,447 disallowed by the Director would have been
    timely. 
    Id. The Director
    next turned to refunds relating to the Mica and Mad Dog properties that
    ONRR had previously allowed. Noting that no tolling agreement covered the Mica property, the
    Director determined that the refund demand was untimely, thereby disallowing any refund
    associated with that property. See AR 71-1132 to 1133. Similarly, the Mad Dog property was
    listed in the May 2013 and December 2013 tolling agreements, but the Director noted that the
    extended adjustment period from the time of BP’s February 2014 demand only reached back to
    6
    Paragraph 1721a(a)(3) provides:
    (3) An adjustment or a request for a refund for an obligation may be made
    after the adjustment period only upon written notice to and approval by the Secretary
    or the applicable delegated State, as appropriate, during an audit of the period which
    includes the production month for which the adjustment is being made. If an
    overpayment is identified during an audit, then the Secretary or the applicable
    delegated State, as appropriate, shall allow a credit or refund in the amount of the
    overpayment.
    30 U.S.C. § 1721a(a)(3).
    6
    the last nine months of 2007, but ONRR had granted the refund request for production months
    January through March 2007. See AR 71-1133. Therefore, the Director disallowed the
    previously approved refund relating to the Mad Dog property for January through March 2007.
    Acting on those determinations, the Director held that ONRR’s initial refund of $254,338
    relating to these properties was improper and had to be returned to the government. See BP
    Expl. & Prod., 
    Inc., 142 Fed. Cl. at 587
    . This outcome also assumed the application of the six-
    year limitation period, but had the seven-year period urged by BP been applied, the request
    would have been timely, and BP would not have been obligated to return the $254,338. 
    Id. Finally, the
    Director addressed whether BP was entitled to interest on the $6,736,368
    refunded pursuant to the appeal. In December 2015, while BP’s appeal before the ONRR
    Director was pending, Congress passed the FAST Act, which amended 30 U.S.C. § 1721 by
    repealing the provisions that had previously authorized ONRR to pay interest on royalty
    overpayment refunds. See FAST Act § 32301; see also 30 U.S.C. § 1721(h) (2012).7 The
    Director noted that the Anti-Deficiency Act, codified in part at 31 U.S.C. § 1341(a)(1)(A),
    prohibits federal agencies from making any expenditure not authorized by law, and he reasoned
    that because the FAST Act repealed ONRR’s statutory authority to pay interest on royalty
    overpayment refunds, the Anti-Deficiency Act therefore prohibited ONRR from paying interest
    on refunds granted after the FAST Act’s effective date, even if such refunds were requested and
    interest had accrued prior to that time. AR 71-1131 to 1132. Consequently, the Director
    declined to award BP interest on the additional refund. AR 71-1132. Notably, the FAST Act
    was enacted during the pendency of BP’s appeal to the ONRR Director; thus, had ONRR
    7
    Before repeal, Subsection 1721(h) provided:
    (h) Lessee or designee interest
    Interest shall be allowed and paid or credited on any overpayment, with such interest
    to accrue from the date such overpayment was made, at the rate obtained by
    applying the provisions of subparagraphs (A) and (B) of section 6621(a)(1) of Title
    26, but determined without regard to the sentence following subparagraph (B) of
    section 6621(a)(1). Interest which has accrued on any overpayment may be applied
    to reduce an underpayment. This subsection applies to overpayments made later
    than six months after August 13, 1996, or September 1, 1996, whichever is later.
    Such interest shall be paid from amounts received as current receipts from sales,
    bonuses, royalties (including interest charges collected under this section and rentals
    of the public lands and the Outer Continental Shelf under the provisions of the
    Mineral Leasing Act [30 U.S.C.A. § 181 et seq.], and the Outer Continental Shelf
    Lands Act [43 U.S.C.A. § 1331 et seq.], which are not payable to a State or the
    Reclamation Fund. The portion of any such interest payment attributable to any
    amounts previously disbursed to a State, the Reclamation Fund, or any other
    recipient designated by law shall be deducted from the next disbursements to that
    recipient made under the applicable law. Such amounts deducted from subsequent
    disbursements shall be credited to miscellaneous receipts in the Treasury.
    30 U.S.C. §1721(h) (2012).
    7
    initially interpreted the tolling agreements in a bilateral manner, as the Director did on appeal,
    the interest on these subsequently refunded amounts would presumably have been paid out in
    2014 prior to the enactment of the FAST Act. See Pl.’s Mot. at 17.
    D.      The Appeal to the Interior Board of Land Appeals
    BP appealed the Director’s decision to the Interior Board of Land Appeals (“Board of
    Land Appeals”). See AR 74. The Royalty Management Act provides that if the Secretary of the
    Interior (the “Secretary”) does not issue a final decision within 33 months from the date the
    proceeding commences, the Secretary is presumed to have issued a decision affirming the
    agency’s prior decision. 30 U.S.C. § 1724(h). That 33-month period ended in early 2018, and
    the Board of Land Appeals accordingly dismissed the appeal for lack of jurisdiction on June 21,
    2018. See AR 84. The Secretary was therefore deemed to have affirmed the Director’s decision
    (1) denying BP’s refund demand of approximately $1,282,447 based on the application of the
    six-year rather than the seven-year limitations period; (2) requiring that BP return approximately
    $254,338 relating to the Mad Dog and Mica refunds previously granted by ONRR; and (3)
    denying interest attributable to overpayment refunds that had been disallowed by ONRR based
    on a unilateral interpretation of the tolling agreements but permitted by the Director based on a
    bilateral interpretation. BP sought judicial review in this court on July 6, 2018.8
    STANDARDS FOR DECISION
    A.        Review in Accord with the Administrative Procedure Act
    Under the Rules of the Court of Federal Claims, “[w]hen proceedings before an agency
    are relevant to a decision in a case, the administrative record of those proceedings must be
    certified by the agency and filed with the court.” RCFC 52.1(a). A claim made pursuant to a
    money-mandating statute invokes this court’s Tucker Act jurisdiction, 28 U.S.C. § 1491, and
    when such a claim challenges agency action, the court must proceed by reviewing the agency’s
    decision under the standards of the Administrative Procedure Act (“APA”), 5 U.S.C. § 706,
    rather than conducting a de novo determination of the facts. See BP Expl. & Prod., 
    Inc., 142 Fed. Cl. at 593
    . Here, as previously noted in the court’s prior decision denying the government’s
    motion to dismiss, “the court is exercising jurisdiction under the Tucker Act, and will review the
    underlying agency decision pursuant to the standards of the APA and RCFC 52.1, just as it
    would for a government procurement case or a military pay or disability case.” 
    Id. This court
    reviews decisions of the Board of Land Appeals under the same standards it
    applies in other types of cases implicating the APA. See Foote Mineral Co. v. United States, 
    654 F.2d 81
    , 85 (Ct. Cl. 1981). Under the APA, the court may set aside an agency decision if it is
    “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law.” 5 U.S.C.
    § 706(2)(A). An agency’s action is arbitrary and capricious if the agency “relied on factors
    which Congress has not intended it to consider, entirely failed to consider an important aspect of
    8
    BP’s suit in this court was timely. A lessee may seek judicial review within 180 days of
    receipt of notice of final agency action. See 30 U.S.C. § 1724(h)(2), (j).
    8
    the problem, offered an explanation for its decision that runs counter to the evidence before the
    agency, or is so implausible that it could not be ascribed to a difference in view or the product of
    agency expertise.” Motor Vehicle Mfrs. Ass’n v. State Farm Mut. Auto. Ins. Co., 
    463 U.S. 29
    , 43
    (1983). In conducting its review, “[t]he court may not ‘substitute its judgment for that of the
    agency,’” Hyperion Inc. v. United States, 
    115 Fed. Cl. 541
    , 550 (2014) (quoting Keeton Corrs.,
    Inc. v. United States, 
    59 Fed. Cl. 753
    , 755 (2004) (in turn quoting Citizens to Preserve Overton
    Park, Inc. v. Volpe, 
    401 U.S. 402
    , 416 (1971), abrogated on other grounds as recognized in
    Califano v. Sanders, 
    430 U.S. 99
    , 105 (1977))), and “must uphold an agency’s decision against a
    challenge if [it] ‘provided a coherent and reasonable explanation of its exercise of discretion,’”
    
    id. (citing Axiom
    Res. Mgmt., Inc. v. United States, 
    564 F.3d 1374
    , 1381 (Fed. Cir. 2009)).
    B. Standards for Evaluating on Agency’s Interpretation of a Statute
    The Chevron doctrine sets forth a two-part inquiry which this court must generally apply
    when reviewing agency interpretations of a statute. Chevron, U.S.A., Inc. v. Natural Res. Def.
    Council, Inc., 
    467 U.S. 837
    (1984); see also PDS Consultants, Inc. v. United States, 
    907 F.3d 1345
    , 1355 (Fed. Cir. 2018). Under Chevron, a court reviewing an agency’s construction of a
    statutory provision that it administers must first determine “whether Congress has directly
    spoken to the precise question at 
    issue.” 467 U.S. at 842
    . If Congress has done so, the analysis
    goes no further, and the reviewing court must give effect to the unambiguous intent of Congress.
    
    Id. at 842-43.
    In other words, the reviewing court owes an agency’s interpretation no deference
    unless it is unable to discern the meaning of the statute after “employing traditional tools of
    statutory construction.” SAS Inst., Inc. v. Iancu, ___ U.S. ___, ___, 
    138 S. Ct. 1348
    , 1358 (2018)
    (quoting 
    Chevron, 467 U.S. at 843
    n.9). If, however, the statute is ambiguous, capable of more
    than one reasonable interpretation, then the court must proceed to the second step of the Chevron
    analysis and defer to the agency’s construction of the statute so long as it is a reasonable one.
    
    Chevron, 467 U.S. at 843
    .
    ANALYSIS
    A. Statutory Interpretation
    The government does not dispute that BP’s refund demands would have been appropriate
    had they been timely. Indeed, if the ONRR Director—after reversing ONRR and concluding that
    the tolling agreements were bilateral—had applied the same seven-year period that ONRR
    initially considered relevant, then the demands would have been timely, and the Director would
    presumably have granted BP’s demands.9 Instead, the Director rejected ONRR’s initial reading
    of the statutory provisions and applied the six-year period, thereby rejecting the claims as
    untimely even when applying the tolling agreements bilaterally. Therefore, whether BP is
    9
    Both the ONRR Director’s decision and the government in this litigation concede that
    the requests “would be timely for all months if subject to the seven-year limitation period in 30
    U.S.C. § 1724(b)(1), as extended by the tolling agreements,” AR 71-1128; see also Hr’g Tr.
    64:3-8 (Mar. 3, 2020).
    The date will be omitted from further citations to the transcript of this hearing.
    9
    entitled to recover its asserted royalty overpayment refunds hinges ultimately on which statute of
    limitations applies to BP’s demands, and that question is a matter of statutory interpretation.
    1. Deference.
    The government asserts that the statutory framework unambiguously supports its reading
    but maintains that even if the court disagrees and finds the statute ambiguous, then it is obligated
    pursuant to Chevron to defer to the agency’s reasonable construction of the relevant statutory
    provisions. See Def.’s Cross-Mot. at 18-19. BP counters that the unambiguous meaning is just
    the opposite of what the government posits but asserts that, regardless, the agency’s
    interpretation does not warrant deference. See Pl.’s Reply at 3-4. Instead, if the court finds the
    statutes to be ambiguous, BP would have it decline to apply Chevron because the agency has
    been inconsistent in its approach. 
    Id. The underlying
    rationale of the Chevron doctrine is that a statutory ambiguity might
    represent an implied congressional delegation of authority for the agency to fill gaps and provide
    further elucidation of meaning, rendering the agency’s ensuing interpretation binding on courts
    “unless procedurally defective, arbitrary or capricious in substance, or manifestly contrary to the
    statute.” United States v. Mead Corp., 
    533 U.S. 218
    , 227 (2001) (citations omitted). Based upon
    that premise, “[t]he fair measure of deference to an agency administering its own statute has been
    understood to vary with circumstances,” and among the factors courts consider in making that
    determination is the consistency of the agency’s position. 
    Id. at 228
    (citation omitted); see also
    Federal Election Comm’n v. Democratic Senatorial Campaign Comm., 
    454 U.S. 27
    , 37 (1981)
    (“[T]he thoroughness, validity, and consistency of an agency’s reasoning are factors that bear
    upon the amount of deference to be given an agency’s ruling.”). Well before the Chevron
    regime—when courts respected agency interpretations while likewise retaining authority to
    exercise independent judgment over them—an interpretive pedigree carried significance, and the
    Supreme Court “declined to give weight to executive interpretations” that had “not been
    uniform.” Baldwin v. United States, 589 U.S. __, __, 
    140 S. Ct. 690
    , 693, (2020) (Thomas, J.,
    dissenting from denial of certiorari) (quoting Merritt v. Cameron, 
    137 U.S. 542
    , 552 (1890)).
    Thus, post-Chevron, “[a]n agency interpretation of a relevant provision which conflicts with the
    agency’s earlier interpretation is ‘entitled to considerably less deference’ than a consistently held
    agency view.” Immigration and Naturalization Serv. v. Cardoza-Fonseca, 
    480 U.S. 421
    , 446
    n.30 (1987) (quoting Watt v. Alaska, 
    451 U.S. 259
    , 273 (1981)). Nonetheless, inconsistent
    interpretations do not necessarily render Chevron inapplicable per se because “[h]ow much
    weight should be given to the agency’s views . . . will depend on the facts of individual cases.”
    Good Samaritan Hosp. v. Shalala, 
    508 U.S. 402
    , 417 (1993) (citation omitted).
    Here, the circumstances of the agency’s inconsistent interpretations counsel against
    affording it deference. To begin, the Director’s decision itself constituted a reversal of ONRR’s
    previous decision to apply the seven-year period rather than the six-year period in this very case.
    And that change by the Director constituted a reversal of what had apparently been ONRR’s
    typical approach. BP identifies at least three occasions where ONRR reflexively applied the
    seven-year period of Section 1724(b) in denying refund demands that extended back further than
    10
    seven years. See Pl.’s Reply Exs. 1-3.10 Notably, in each of these cases, applying the longer
    period was hardly a moot point because application of the six-year period would have resulted in
    a smaller refund. See 
    id. Furthermore, the
    inconsistency in this instance represents a change implicating the
    agency’s own financial interest. The Director adopted an interpretation that was both contrary to
    its prior approach and redounded to ONRR’s financial benefit by narrowing its liability for
    overpayment refunds. See Amalgamated Sugar Co. LLC v. Vilsack, 
    563 F.3d 822
    , 834 (9th Cir.
    2009) (noting that, while not an automatic rebuttal of deference, “[w]here an agency interprets or
    administers a statute in a way that furthers its own administrative or financial interests, the
    agency interpretation must be subject to greater scrutiny”).
    In sum, the Director’s decision respecting applicability vel non of the statutes of
    limitations will not be accorded deference.
    2. The government’s and BP’s conflicting interpretations.
    In this court, the government and BP offer conflicting readings of the statutory provisions
    at issue. BP’s construction begins by differentiating two “categorically different types” of refund
    requests: an informal request for refund under Subsection 1721a(a) and a formal demand under
    Subsections 1721a(b) and 1724(b). See Pl.’s Mot. at 21. BP asserts that an informal request for
    refund under Paragraph 1721a(a)(1)11 must be made within the six-year adjustment period12
    10
    Somewhat cryptically, the government counters that these three decisions “do not
    provide sufficient information to determine whether the six-year adjustment period would apply
    under ONRR’s interpretation,” Def.’s Reply at 5 n.3, by which it apparently means that the
    letters do not indicate whether audits of the relevant periods were ongoing when these demands
    were made. But the government’s oblique attempt to disregard these letters fails to support its
    assertion. On their face, the letters nowhere suggest that the demands related to audits.
    The three decisions are set out in letters, as follows: (1) Letter from Robert Prael,
    ONRR, to Kyle Silvio, Exxon Mobil (Mar. 5, 2015); (2) Letter from Robert Prael, ONRR, to
    Sharon Rodgers, Exxon Mobil (July 14, 2015); (3) Letter from Robert Prael, ONRR, to Ross
    Lanzini, Exxon Mobil (Apr. 18, 2014). These letters and attendant correspondence are set out as
    exhibits to BP’s reply.
    11
    Paragraph 1721a(a)(1) provides in part that, “If, during the adjustment period, a lessee
    . . . determines that an adjustment or refund request is necessary to correct an underpayment or
    overpayment of an obligation, the lessee . . . shall make such adjustment or request a refund
    within a reasonable period of time and only during the adjustment period.”
    12
    Paragraph 1721a(a)(4) provides that, “For purposes of this section, the adjustment
    period for any obligation shall be the six-year period following the date on which an obligation
    became due.”
    11
    subject to an extension beyond that time allowed for ongoing audits in Paragraph 1721a(a)(3).13
    
    Id. at 21-23.
    Alternatively, as BP would have it, a formal demand under Subsection 1721a(b)
    “must satisfy formalities not required for a refund request under S[ubs]ection 1721a(a),” 
    id. at 21,
    and must be made within the seven-year limitation period set forth in Paragraph 1724(b)(1).14
    The formalities required for a request to qualify as a formal demand are listed in Subparagraphs
    1721a(b)(1)(A)-(D): the request must “(A) [be] made in writing to the Secretary and, for
    purposes of section 1724 of this title, [be] specifically identified as a demand; (B) identif[y] the
    person entitled to such refund; (C) provide[] the Secretary information that reasonably enables
    the Secretary to identify the overpayment for which such refund is sought; and (D) provide[] the
    reasons why the payment was an overpayment.” 30 U.S.C. § 1721a(b)(1)(A)-(D).
    BP supports drawing a distinction between requests for refund under Subsection 1721a(a)
    and formal demands under Subsection 1721a(b) in several ways, but it might well have
    summarized its arguments by resort to an incisive adage—things that are different are not the
    same. First, BP notes that Subsection 1721a(b) expressly cross-references Section 1724 while
    Subsection 1721a(a) makes no mention of it. See Pl.’s Mot. at 21. Second, it emphasizes the
    difference in required formalities between the two subsections, noting that, quite unlike
    Subsection 1721a(b), a refund request under Subsection 1721a(a) “need not satisfy any
    formalities (other than when made after six years, having to be in writing).” 
    Id. Third, the
    method for refunding royalty overpayments differs with respect to each subsection. 
    Id. While Paragraph
    1721a(a)(3) simply directs “the Secretary [of Interior] . . . [to] allow a credit or refund
    in the amount of the overpayment,” Paragraph 1721a(b)(2) requires instead that the Secretary of
    the Treasury make the refund, but only after the Secretary of Interior certifies the amount to be
    paid, and then provides relatively detailed accounting guidance, specifying the precise sources
    from which the funds are to be paid. 
    Id. Fourth, BP
    points to the particular legal consequences
    triggered by a Subsection 1721a(b) demand but not a Subsection 1721a(a) request. 
    Id. BP identifies
    that these include (1) qualification as a “demand” under 30 U.S.C. § 1702(23);15 (2) a
    13
    Paragraph 1721a(a)(3) provides that, “An adjustment or a request for a refund for an
    obligation may be made after the adjustment period only upon written notice to and approval by
    the Secretary . . . during an audit of the period which includes the production month for which the
    adjustment is being made.”
    14
    Paragraph 1724(b)(1) provides in part that a “demand which arises from, or relates to an
    obligation, shall be commenced within seven years from the date on which the obligation
    becomes due and if not so commenced shall be barred.”
    15
    A demand is defined in part as:
    a separate written request by a lessee or its designee which asserts an obligation due
    the lessee or its designee that provides a reasonable basis to conclude that the
    obligation in the amount of the demand is due and owing, but does not mean any
    royalty or production report, or any information contained therein, required by the
    Secretary or a delegated State.
    30 U.S.C. § 1702(23)(B).
    12
    120-day period for the agency to either pay or deny the request;16 (3) the right to bring suit to
    enforce the obligation beyond the seventh year;17 and (4) a 33-month period for resolving
    administrative appeals.18 Pl.’s Mot. at 21.
    Finally, BP maintains that its “interpretation is consistent with the focus in [Paragraph]
    1721a(a)(3) on the presence of an ongoing audit.” Pl.’s Mot. at 22. In its view, the informal
    procedure of Subsection 1721a(a) “aligns with the give-and-take of the audit process,” which in
    turn “provides a vehicle for resolving claims without the formalities of a S[ubs]ection 1721a(b)
    ‘demand,’” enabling the parties to “work together” to make the necessary adjustments. 
    Id. And, to
    illustrate how its reading of the statute plays out in actual practice, BP cites its own experience
    in cooperating with ONRR auditors to make adjustments throughout the process. 
    Id. Consistent with
    this interpretation, BP asserts that its refund requests “satisfied the
    statutory requirements for the issuance of a formal ‘demand,’ [meaning] BP is entitled to recover
    its royalty overpayments made within seven years prior to its issuance of the demands, as
    extended by the [t]olling [a]greements.” Pl.’s Mot. at 23.
    The government contends that BP’s reading “is a too-simplistic interpretation,” Def.’s
    Cross-Mot. at 16, and “incongruous with the language of the statute,” Def.’s Reply at 7.
    Dismissing BP’s distinction between informal refund requests and formal demands, the
    government contends that, at least under Section 1721a, refunds are “a specific type of demand
    16
    This paragraph provides that:
    A refund under this subsection shall be paid or denied (with an explanation of the
    reasons for the denial) within 120 days of the date on which the request for refund is
    received by the Secretary. Such refund shall be subject to later audit by the
    Secretary or the applicable delegated State and subject to the provisions of this
    chapter.
    30 U.S.C. § 1721a(b)(3).
    17
    This pertinent subsection provides:
    In the event a demand subject to this section is properly and timely commenced, the
    obligation which is the subject of the demand may be enforced beyond the seven-
    year limitations period without being barred by this statute of limitations. . . .
    30 U.S.C. § 1724(j).
    18
    The statute commands that:
    The Secretary shall issue a final decision in any administrative proceeding . . . within
    33 months from the date such proceeding was commenced . . . .
    30 U.S.C. § 1724(h)(1).
    13
    for the return of overpaid royalties,” Def.’s Cross-Mot. at 16, and thus “all refunds for royalty
    overpayments must also be demands,” Def.’s Reply at 7 (emphasis in original). In the
    government’s view, then, the aforementioned aphorism has no bearing here—things that are
    different really are the same. Building on its conflation of refund requests and demands (at least
    respecting Section 1721a), the government insists that “to adopt BP’s interpretation that all
    demands are subject to the seven-year limitations period would completely read out of [Section]
    1721a the requirement that a lessee make an adjustment or refund request only during the
    adjustment period.” Def.’s Reply at 7 (internal quotations omitted) (emphasis in original). The
    government likewise asserts that “BP also renders the entirety of [Subsection] 1721a(b)
    superfluous because, pursuant to BP’s interpretation, all refund requests must be subject to the
    seven-year limitations period rather than the six-year adjustment period.” 
    Id. at 8.
    In sum, the
    government casts doubt on BP’s reading by concluding that “[b]ecause the adjustment period
    applies to any adjustment or refund request, and because subsection (b) specifies that refund
    requests under this section must be identified as demands, the adjustment period applies not only
    to adjustments, but also at least to some demands as well.” Def.’s Cross-Mot. at 16 (internal
    quotations omitted).
    The government supports its proffered interpretation by pointing to the canon of statutory
    construction that the specific governs the general. Def.’s Cross-Mot. at 16. As applied here,
    “the limitations period for demands in [Paragraph] 1724 is the general rule,” but “the adjustment
    period applies specifically to one type of demands—refunds of royalty overpayments, as long as
    they meet the other requirements of [Section] 1721a(b)(1).” Id at 17. That leads the government
    to conclude that all refund requests made under Section 1721a must also be demands, and “a
    demand for a refund of a royalty overpayment is subject to the six-year adjustment period rather
    than the seven-year limitations period,” 
    id., although it
    declines to take a position on what other
    types of demands might be subject to the seven-year period, 
    id. at n.5.
    The government does allow that demands made under Section 1721a might sometimes
    fall within the seven-year period, but only those that fall within the exception in Paragraph
    1721a(a)(3). Def.’s Cross-Mot. at 19. That paragraph provides that a lessee may request an
    adjustment or refund outside of the six-year adjustment period “only upon written notice to and
    approval by the Secretary . . . during an audit of the period which includes the production month
    for which the adjustment is being made.” 30 U.S.C. § 1721a(a)(3). But the exception does not
    apply to BP’s claims, the government contends, because they “were neither made during an audit
    nor covered by the audit.” Def.’s Cross-Mot. at 19. Thus, the government concludes that while
    “the seven-year limitations period applies to both parties, [] refund demands within the scope of
    [Section] 1721a must also be made within the six-year adjustment period unless they fit within
    the exception provided by [Paragraph] 1721a(a)(3).” Def.’s Reply at 7.
    Both parties manage to underscore inadequacies in the other’s interpretation, and the
    court finds that both offer a reading of the text of the statute that exhibits inconsistencies and
    conflicting overlaps. For example, the government fails to proffer a cogent explanation for what
    meaning, if any, its reading would assign to Subsection 1721a(b) and its attendant cross-
    reference to Section 1724, if all refund requests are subject to the time constraints of Subsection
    1721a(a). The court hesitates to adopt a reading of statutory text that renders a significant
    portion of it largely meaningless or inexplicable, thereby violating “the cardinal principle of
    14
    statutory construction.” Williams v. Taylor, 
    529 U.S. 362
    , 364 (2000). Moreover, the
    government disregards the apparent differences in procedure between the two subsections, such
    as the requirement that payment must come from the Secretary of the Treasury in one case but
    not the other. It also would permit auditors to disallow refund requests by lessees on the ground
    that they exceed the scope of the audit being conducted under Section 1721a and then preclude
    any recovery afterward by terminating the audit after the six-year period expires. Nor is BP’s
    interpretation immune from serious criticism. BP is plainly correct that Subsection 1721a(a)
    must be different from Subsection 1721a(b), but its reading places excessive weight on form
    over substance. BP’s interpretation renders the time limitation of Paragraphs 1721a(a)(1) and (4)
    meaningless because at any time beyond the six-year period the lessee could simply evade that
    limit by labelling its request a demand, thereby unilaterally procuring itself the safe harbor of an
    additional year. It seems doubtful, indeed illogical, that Congress would carefully craft a
    loophole that so blatantly swallows the rule. Consequently, neither party offers an entirely
    satisfactory construction, but a third approach avoids these difficulties and is more consistent
    with the statute’s plain meaning and structure.
    3. A construction faithful to the statutory text.
    No court has yet been called upon to address the precise legal question of when to apply
    the six-year versus the seven-year limitation period. As such, this is an issue of first impression,
    and, as it must, the court begins with the text of the statutory provisions involved. See Consumer
    Prod. Safety Comm’n v. GTE Sylvania, 
    447 U.S. 102
    , 108 (1980) (“[T]he starting point for
    interpreting a statute is the language of the statute itself.”). That is enough to decide this case.
    Section 1721a is divided into two subsections that differ in important ways and
    noticeably implicate two distinct contexts. Subsection 1721a(a) allows for certain kinds of
    adjustments or refund requests that can, as a general rule, occur “only during the adjustment
    period” of six years. 30 U.S.C. § 1721a(a)(1). Significantly, Subsection 1721a(a) applies upon
    the existence of an audit. That predicate is stated in Paragraph 1721a(a)(3), which allows a
    lessee, subject to notice and approval by the Secretary of Interior, to seek an adjustment or
    request a refund beyond the six-year period so long as it is made “during an audit of the period
    which includes the production month for which the adjustment is being made.” The rule making
    it impossible to seek a time extension after an audit has concluded strongly suggests that the
    statute contemplates that an audit, once initiated, encompasses all adjustments or refunds within
    the audit’s scope requested under Subsection 1721a(a). It follows then that the procedures and
    time limitations outlined in Subsection 1721a(a) are triggered when ONRR unilaterally initiates
    an audit, or potentially when an audit is triggered by a lessee’s independent request for a refund,
    at least respecting costs included within the scope of the audit.
    That understanding of Subsection 1721a(a) becomes even more apparent when read in
    tandem with Subsection 1721a(b). In the event that some overpayment amounts are not included
    within the scope of an audit, and thus do not fall within the processes of Subsection 1721a(a),
    Subsection 1721a(b) provides a vehicle for lessees to unilaterally seek a refund by submitting a
    refund demand. Subsection 1721a(b) sets forth requirements for how to make a demand and, by
    explicit cross-reference, incorporates the seven-year time limitation in Section 1724 for doing so.
    15
    In sum, Subsection 1721a(a) applies when the overpayments at issue are subject to an
    ONRR audit and Subsection 1721a(b) applies to allow lessees to demand refunds when the
    overpayments are not subject to an audit. Such an interpretation follows logically from a plain
    reading of the statutory language and avoids the strains produced by the parties’ proffered
    interpretations. Furthermore, it permits both subsections of Section 1721a to carry independent
    meaning, accounting for the differences in procedure and formality between the two.
    B. BP’s Claims Are Subject to the Seven-Year Limitations Period
    The threshold question for determining which limitation period applies is thus whether
    the demands at issue concern overpayments that fall within or outside the scope of ONRR’s
    audit. Under Subsection 1721a(a), requests within the scope of an audit must be brought within
    six years unless, during the audit, the Secretary of Interior approves a written notice requesting a
    refund. Under Subsection 1721a(b) and Section 1724, requests outside the scope of an audit
    must be brought within seven years. If the seven-year period applies, the court must then
    determine whether the demands satisfied the formal requirements of Subparagraphs
    1721a(b)(1)(A)-(D). Here, the parties do not appear to contest that BP satisfied the procedural
    requirements of Subparagraphs 1721a(b)(1)(A)-(D) in submitting its demands.
    BP’s demands of November 2013 and February 2014 sought $1,282,447 and were denied
    as untimely by the ONRR Director. The Director noted first that the “requests would be timely
    for all months if subject to the seven-year limitation period,” AR 71-1128, but decided that the
    six-year period governed, and so BP was not entitled to an extension beyond that time because it
    “did not file its [d]emands during an audit of the claimed costs,” AR 71-1129. That conclusion
    was premised on the Director’s dual determination that (1) the “[a]udit did not cover the costs”
    BP sought to include in its deduction and, even so, (2) the audit was closed before BP requested
    the refunds. AR 71-1128. Repeatedly, the Director emphasized that “none of the costs that BP
    now claims in its [d]emands were ever before ONRR to review as part of the Na Kika [a]udit.”
    AR 71-1130. In the ensuing litigation before this court, the government has emphatically taken
    the same position, asserting that “all of BP’s costs were outside the scope of the audit.” Def.’s
    Cross-Mot. at 26. Indeed, that assumption is a core part of the government’s position that BP
    could not seek an extension under its interpretation of Paragraph 1721a(a)(3). In the
    government’s view, the costs were never eligible for the one-year extension because no audit
    ever considered them.
    Because both the ONRR Director’s decision and the government in this litigation adopt
    the premise that the disputed costs were not within the scope of any audit, the court need not
    consider how to determine the Na Kika audit’s precise scope and breadth. Although in some
    cases addressing the particular and precise scope of an audit might well be a crucial or even
    dispositive question, this is not such a case because the government concedes the point.19 It is
    significant to note, however, that the scope of a tolling agreement, even if entered into as a
    19
    Notably, however, at oral argument the government seemed unable to provide any
    limiting principle to guide the court in determining the boundaries of audit scope. See, e.g., Hr’g
    Tr. 47:17 to 54:5; 62:17 to 64:1.
    16
    consequence of an audit, does not serve to define the scope of the audit because tolling
    agreements are not necessarily coextensive with audits. Subsection 1721a(a)(4) permits the
    tolling of the audit adjustment period by incorporating the tolling provisions of Section 1724,
    which also operates to toll amounts not under audit, indicating that tolling agreements can
    function independently from audits and can include amounts either under audit or not under
    audit. As such, tolling agreements cannot reflexively be used to define the scope of an audit.
    Furthermore, there cannot be any question here that the tolling agreements at issue operated to
    toll the limitation period of both audited and unaudited costs because they expressly covered any
    limitation periods in both Sections 1721a and 1724. See, e.g., AR 9-45. 20
    In sum, the costs in BP’s demands were not subject to ONRR’s audit and thus do not fall
    within the six-year limitation period of Subsection 1721a(a). Instead, the requests met the
    demand requirements of Subsection 1721a(b) and accordingly fall within the seven-year
    limitation period of Subsection 1724(b). It follows that the costs included in BP’s demand letters
    are subject to the seven-year limitation period as extended, where applicable, by the tolling
    agreements. Therefore, consistent with the ONRR Director’s recognition, applying the seven-
    year period renders BP’s demands timely, at least insofar as they are included in the tolling
    agreements.
    C. The Mica and Mad Dog Properties
    BP next challenges the ONRR Director’s decision ordering BP to repay21 the refunds that
    ONRR, applying a seven-year statute of limitations, had previously allowed in relation to the
    Mica and Mad Dog Properties. See Pl.’s Mot. at 26. 22 The Director first determined that,
    contrary to ONRR’s original approach, the six-year statute of limitations governed refunds for
    20
    The Director’s decision, despite its flawed interpretation of Section 1721a, recognized
    that these tolling agreements included unaudited costs. See AR 71-1127 to 1128.
    21
    In response to the Director’s order, BP represents that it did return the amounts ordered
    to be refunded, “under protest . . . so that all the dollars at issue could be before [the court].”
    Hr’g Tr. 73:12-14.
    22
    The precise amount at issue here is subject to inconsistencies that stem from what are
    apparently typographical errors in the parties’ filings. For example, the complaint states that the
    refunded amount included $188,821 attributable to Mad Dog and $65,517 attributable to Mica,
    for a total of $254,338. Compl. ¶ 28. In its motion for judgment on the administrative record,
    however, plaintiff states that the amount is $188,821 attributable to Mad Dog and $45,517
    attributable to Mica, for a total of $234,338. Pl.’s Mot. at 26. In its response and cross-motion,
    without further explanation, the government includes both inconsistent totals at different places.
    See Def.’s Cross-Mot. at 29-30. Then in its response, plaintiff appears to misquote the
    government’s brief, identifying the total as $354,338. Pl.’s Reply at 23 (quoting incorrectly
    Def.’s Cross-Mot. at 30). The government again uses the original figure of $254,338 in its reply.
    Def.’s Reply at 16. As the parties’ filings do not acknowledge these discrepancies, they appear
    to be the consequence of scrivener’s errors, and the court will proceed on the basis that the
    appropriate figures are those originally included in the complaint, totaling $254,338.
    17
    both properties (neither of which, he concluded, was under audit). See AR 71-1132 to 1133.
    Turning to the Mica property, he noted that it had not been covered by any of the tolling
    agreements, such that, after applying a six-year adjustment period from the February 2014 refund
    request date, the first month within the time eligible for refund was January 2008. See AR 71-
    1133 to 1134. Because the ONRR auditors had permitted refunds for production months in
    2007, the Director concluded that BP must return those untimely requested refunds. AR 71-
    1133. Similarly, the Director noted that, although covered by two tolling agreements, the Mad
    Dog property was only tolled for a period of 260 days, meaning that “[b]ased on the date of BP’s
    2014 [d]emand—February 12, 2014—the extended adjustment period reached back to May 28,
    2007,” but ONRR had “granted the refund request for production months January 2007 through
    March 2007.” AR 71-1133. Thus, the Director concluded that BP must also return the Mad Dog
    refunds for the production months January 2007 through March 2007. See AR 71-1133.
    In their briefs, the parties focus their attention respecting the Mica and Mad Dog
    properties primarily on BP’s secondary argument that the Director’s decision ordering repayment
    of the refunds constituted a demand barred by the seven-year statute of limitations. See Pl.’s
    Mot. at 26; Def.’s Cross-Mot. at 28-30. But those arguments are rendered irrelevant by the
    court’s conclusion that demands respecting unaudited costs are subject to the seven-year
    limitation period of Subsections 1721a(b) and 1724(b), which extends the refund period for the
    Mica and Mad Dog properties until at least the beginning of 2007, covering all the disputed
    amounts. ONRR initially applied the seven-year limit and appropriately acquiesced to BP’s
    demands for a refund of costs associated with Mica and Mad Dog from that time. But, while
    acknowledging that the relevant costs were not under audit, the Director’s decision concerning
    Mica and Mad Dog erred by reversing ONRR and applying the six-year adjustment period to
    unaudited costs. Application of the seven-year period leads to the conclusion that BP’s refund
    demands were timely and appropriately granted by ONRR. Consequently, the Director erred in
    ordering BP to repay the $254,338 refund associated with the Mica and Mad Dog properties.
    D. BP’s Eligibility for Interest on Overpayments
    As enacted by the Royalty Simplification Act, Subsection 1721(h) required that interest
    “be allowed and paid or credited on any overpayment, with such interest to accrue from the date
    such overpayment was made.” 30 U.S.C. § 1721(h) (2012). In 2015, the FAST Act eliminated
    that provision for interest, stating simply that Section 1721 was amended “by striking
    [S]ubsection[] (h).” FAST Act § 32301. BP’s overpayments were made prior to the 2015
    enactment of the FAST Act, and, in addition to the refund of overpayments, BP claims that it is
    entitled to interest “that accrued from the time that BP made the royalty overpayments through
    the date on which [the Department of] Interior has refunded the overpayments.” Pl.’s Mot. at 27.
    The government does not dispute BP’s right to recover interest that accrued before the effective
    date of the FAST Act on December 4, 2015. See Def.’s Cross-Mot. at 32. The government
    contends, however, that the FAST Act eliminated ONRR’s authority to pay interest after
    December 4, 2015, such that no further interest could accrue after that time. See 
    id. BP supports
    its position by reference to the Federal Savings Statute, 1 U.S.C. § 109. See
    Pl.’s Mot. at 27-28. In relevant part, the Federal Savings Statute provides that—
    18
    [t]he repeal of any statute shall not have the effect to release or extinguish any
    penalty, forfeiture, or liability incurred under such statute, unless the repealing
    Act shall so expressly provide, and such statute shall be treated as still remaining
    in force for the purpose of sustaining any proper action or prosecution for the
    enforcement of such penalty, forfeiture, or liability.
    1 U.S.C. § 109. First enacted in 1871 to override the common law rule that presumptively
    eliminated statutory liabilities upon a statute’s repeal, see Stauffer v. Brooks Bros. Group, Inc.,
    
    758 F.3d 1314
    , 1321 n.3 (Fed. Cir. 2014); see also Warden v. Marrero, 
    417 U.S. 653
    , 660
    (1974), the Federal Savings Statute establishes “a rule of construction . . . to be read and
    construed as a part of all subsequent repealing statutes, in order to give effect to the will and
    intent of Congress,” Hertz v. Woodman, 
    218 U.S. 205
    , 217 (1910) (citations omitted); see also
    United States v. Reisinger, 
    128 U.S. 398
    , 401 (1888). BP asserts that the FAST Act—far from
    expressly providing that it applies retroactively to overpayments made prior to its enactment—is
    simply silent on the matter of retroactive application, and thus the background principle of the
    Federal Savings Statute functions to preserve the continuing accrual of interest on obligations
    incurred prior to the effective date of the FAST Act. Pl.’s Mot. at 28. BP bolsters its argument
    against retroactive application by noting the contrast that “where it intended to do so, Congress
    explicitly made other provisions of the FAST Act retroactive.” Id.23
    The disputed issue regarding interest is thus whether the FAST Act prospectively cut off
    the continued accrual of interest after its enactment. Building on the foundation of the Federal
    Savings Statute, BP cites two cases in support of its assertion that interest on preexisting
    obligations continued to accrue even after enactment of the FAST Act. See Pl.’s Mot. at 29-31.
    First, it points to the Supreme Court’s decision in De La Rama S.S. Co. v. United States, 
    344 U.S. 386
    (1953). 
    Id. De La
    Rama held that the Federal Savings Statute operated, after repeal of
    the statute that had created a disputed liability, not only to preserve the liability at issue but also
    the jurisdictional provisions that the repealed statute had created to enforce liabilities incurred
    thereunder. 
    Id. at 389-90.
    The enforcement mechanism and the liability itself were, the Court
    held, “part and parcel” of the same congressional objective. 
    Id. at 390.
    Likewise, BP asserts,
    “the Federal Savings Statute saves both the government’s liability for interest on overpaid
    royalties made prior to the FAST Act and the means to satisfy that liability.” Pl.’s Mot. at 29
    (emphasis in original).
    Second, BP cites Korshin v. Commissioner, 
    91 F.3d 670
    (4th Cir. 1996), where the
    Fourth Circuit had occasion to address the Federal Savings Statute as it applied to a repealed
    23
    This argument is reminiscent of a familiar canon of statutory interpretation, expressio
    unius est exclusio alterius, namely, the assumption that “expressing one item of a commonly
    associated group or series excludes another left unmentioned.” United States v. Vonn, 
    535 U.S. 55
    , 65 (2002). The canon is a helpful interpretive aid but is not always apt and serves “only [as]
    a guide, whose fallibility can be shown by contrary indications that adopting a particular rule or
    statute was probably not meant to signal any exclusion of its common relatives.” 
    Id. (citations omitted).
    Nonetheless, the compelling and undisputed suggestion here is that by explicitly
    making certain provisions retroactive, Congress intended by its silence elsewhere in the same
    statute to act only prospectively.
    19
    statutory provision allowing the accrual of interest. Pl.’s Mot. at 30-31. Korshin involved a
    provision of the Internal Revenue Code which required the payment of interest on negligently
    underpaid taxes. 
    See 91 F.3d at 672
    . That provision specified that interest would accrue from
    the date the tax was due until either the date of assessment or payment, whichever occurred first,
    but Congress repealed the provision in 1988. See 
    id. at 674.
    The Fourth Circuit rejected
    Korshin’s argument that interest on his underpayments between 1983 and 1987 should have
    stopped accruing in 1988, upon repeal of the interest-authorizing provisions. See 
    id. at 674-75.
    The court first concluded that the repealing act did not “specifically provide[] for the
    extinguishment of existing liabilities for negligent underpayment.” 
    Id. at 674.
    Reasoning from
    that premise, the court applied the Federal Savings Statute to determine that liabilities under the
    repealed version of the statute must be preserved, and to do so “the interest portions . . . must be
    given their full value as prescribed by the statute; the interest must therefore begin and stop
    accruing as the statute[] specified.” 
    Id. at 674-75.
    BP contends that “[t]he Federal Savings
    Statute compels the same result in this case—the interest on royalty overpayments that BP made
    prior to the effective date of the FAST Act began accruing from the date of overpayment and
    continued to accrue until the overpayment is recovered.” Pl.’s Mot. at 31 (quotations omitted).
    The government counters that the legislative history of the FAST Act and principles of
    sovereign immunity pose obstacles to the continued accrual of interest after 2015, and it attempts
    to dismiss each of BP’s arguments in turn. See Def.’s Cross-Mot. at 32-37. The court finds
    these arguments unpersuasive. Almost as a starting point, the government posits that “the FAST
    Act’s legislative history confirms that the limited effect of [Sub]section 1721(h)’s repeal was to
    end the accrual of any overpayment interest after December 3, 2015.” Def.’s Cross-Mot. at 33.
    In support of that conclusion, it proceeds through a series of ostensibly supporting sources,
    including Department of Interior budget justifications, Office of Management and Budget
    submissions to Congress, a conference committee report, and a Congressional Budget Office
    projection. See 
    id. at 33-35.
    But “a court’s proper starting point lies in a careful examination of
    the ordinary meaning and structure of the law itself . . . . [and where] that examination yields a
    clear answer, judges must stop.” Food Marketing Inst. v. Argus Leader Media, __ U.S. __, __,
    
    139 S. Ct. 2356
    , 2364 (2019) (citations omitted). “[C]lear evidence of congressional intent may
    illuminate ambiguous text,” but ambiguous legislative history can never be used “to muddy clear
    statutory language.” Milner v. Department of Navy, 
    562 U.S. 562
    , 572 (2011). Here, the
    government’s resort to legislative history disregards the statutory backdrop of the Federal
    Savings Statute. The Federal Savings Statute establishes an interpretive premise that has to be
    applied by the interpreter; the result produced here is that absent any express repeal of existing
    liabilities and the related interest accrual provisions, Congress left those provisions intact. The
    proffered legislative history would be used to develop inferences that would create ambiguity
    where there is none.
    The government then asserts that the FAST Act “withdrew the waiver of sovereign
    immunity as to the accrual of interest.” Def.’s Cross-Mot. at 36. While it correctly notes that the
    sovereign may not be subjected to suit without an express waiver of immunity, that such waivers
    must be construed strictly and narrowly, and that ambiguity must be resolved in favor of the
    sovereign, see 
    id., the government
    mistakenly severs the interest obligation from the wavier of
    sovereign immunity. The Federal Savings Statute does “not merely save from extinction a
    liability incurred under the repealed statute; it save[s] the statute itself.” De La Rama S.S. Co.,
    
    20 344 U.S. at 389
    . Thus, Subsection 1721(h) represented an express waiver of sovereign
    immunity, and the Federal Savings Statute functioned to preserve that waiver as it existed when
    Congress prospectively repealed the provision in 2015. Indeed, it is difficult to conceive how the
    Federal Savings Statute could have “saved the statute itself” without preserving the immunity
    waiver. See 
    id. As in
    De La Rama, where recovery of obligations due was premised on the
    associated grant of jurisdiction and both were preserved by the Federal Savings Statute, 
    see 344 U.S. at 390
    , so here the recovery of interest obligations is premised on a waiver of sovereign
    immunity. Thus, while the FAST Act eliminated government liability for interest on obligations
    incurred after its enactment, not those incurred before, it did not implicitly remove its previous
    express waiver of immunity. The government is manifestly correct that “interest cannot be
    recovered in a suit against the [g]overnment in the absence of an express waiver of sovereign
    immunity from an award of interest,” Def.’s Reply at 17 (quotation omitted), but it fails to
    recognize that Section 1721(h) did waive immunity, and its repeal, in light of the Federal
    Savings Statute, did nothing to withdraw that waiver. Likewise, contrary to the government’s
    contention, the fact that interest here is compounding does not somehow daily create a new
    liability. See Def.’s Cross-Mot. at 37. The compounding nature of the interest is “part and
    parcel” of the underlying obligation, integral to the statute as it originally existed, and in no way
    changes the analysis. See De La 
    Rama, 344 U.S. at 390
    .
    The government seeks to undermine BP’s reliance on Korshin by distinguishing it in
    several respects. First, it claims that Korshin involved interest owed to, rather than by, the
    United States, and for that reason did not implicate the same issues of sovereign immunity. See
    Def.’s Cross-Mot. at 37. As already noted, however, sovereign immunity does not pose the
    barrier the government would establish. Second, the government emphasizes that the statute in
    Korshin explicitly stated that interest would accrue until the date of payment, and thus was
    unaffected by the repeal in light of the Federal Savings Statute, whereas Subsection 1721(h) did
    not specify the end date of the accrual and as such there was nothing to preserve in that regard.
    See Hr’g Tr. 68:24 to 71:11. This difference does not, however, carry as much weight as the
    government supposes. Significantly, the statute in Korshin did not merely specify that interest
    would accrue until the date of payment; rather, it provided that interest would accrue until the
    earlier of two possible events occurred—the assessment date or the payment date. See 
    Korshin, 91 F.3d at 674
    . One generally assumes that interest accrues until the date the underlying
    obligation is satisfied, unless some other date or cut-off event is specified. The need to clarify,
    as in Korshin, only arises when other alternatives are available. The statute here being silent on
    the matter, no evident date other than that of payment presents itself. By silence, the statute
    implicitly assumes that interest will accrue until the underlying obligation is paid, and the
    government presents no basis to suspect that Congress would have understood it differently
    when it declined to expressly cut off interest accrual on previously incurred obligations when it
    enacted the FAST Act. Indeed, the government acknowledges that, prior to repeal, “ONRR
    could [and did] reasonably interpret [Subs]ection 1721(h) to require the accrual of interest until
    the return of overpayment principal, inasmuch as no statutory language prescribed when accruals
    ended or otherwise limited future accruals.” Def.’s Reply at 18. The court agrees. Moreover, if
    it was a reasonable interpretation of the statute before repeal, the government proffers no
    compelling reason why that understanding of the statute—which was preserved by the Federal
    Savings Statute—would cease to be reasonable after repeal.
    21
    CONCLUSION
    For the reasons stated, BP’s motion for judgment on the administrative record is
    GRANTED and the government’s cross-motion is DENIED. BP is awarded judgment for
    $1,536,785 ($1,282,447 plus $254,338), as well as interest on all unpaid refunds computed “at
    the rate obtained by applying the provisions of subparagraphs (A) and (B) of section 6621(a)(1)
    of Title 26, but determined without regard to the sentence following subparagraph (B) of section
    662(a)(1),” 30 U.S.C. § 1721(h) (2012), applied continuously until the judgment is paid. The
    clerk shall enter judgment accordingly.
    BP is awarded its costs of suit.
    It is so ORDERED.
    s/ Charles F. Lettow
    Charles F. Lettow
    Senior Judge
    22