ExxonMobil Oil Corp v. FERC ( 2007 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued December 12, 2006                 Decided May 29, 2007
    No. 04-1102
    EXXONMOBIL OIL CORPORATION,
    PETITIONER
    v.
    FEDERAL ENERGY REGULATORY COMMISSION AND
    UNITED STATES OF AMERICA,
    RESPONDENTS
    WESTERN REFINING COMPANY, L.P., ET AL.,
    INTERVENORS
    Consolidated with
    04-1103, 04-1104, 04-1140, 04-1142, 04-1143, 04-1160,
    05-1204, 05-1217, 05-1218, 05-1219, 05-1223, 05-1226,
    05-1232, 05-1245, 05-1303
    ______
    On Petitions for Review of Orders of the
    Federal Energy Regulatory Commission
    Thomas J. Eastment and R. Gordon Gooch argued the cause
    for Shipper Petitioners. With them on the briefs were Joshua B.
    Frank, Elisabeth R. Myers, George L. Weber, Walter Lowry
    Barfield, III., Steven A. Adducci, Richard E. Powers, Jr., Marcus
    W. Sisk, Jr., and Frederick G. Jauss IV.
    2
    Charles F. Caldwell and Christopher J. Barr argued the
    cause for petitioners SFPP, L.P. and the Association of Oil Pipe
    Lines. With them on the briefs were Albert S. Tabor, Jr.,
    Catherine O’Harra, Sabina K. Dugal, Steven H. Brose, Timothy
    M. Walsh, Daniel J. Poynor, and Michele F. Joy. Erin M.
    Murphy, Neil Patten, Judith M. Andrade, Kevin B. Bedell, Glenn
    S. Benson, and Michael J. Manning entered appearances.
    Lona T. Perry, Attorney, Federal Energy Regulatory
    Commission, argued the cause for respondent. With her on the
    brief were R. Hewitt Pate, Assistant Attorney General, U.S.
    Department of Justice, John J. Powers, III., and Robert J.
    Wiggers, Attorneys, John S. Moot, General Counsel, Federal
    Energy Regulatory Commission, and Robert H. Solomon,
    Solicitor. Robert B. Nicholson, Attorney, U.S. Department of
    Justice, entered an appearance.
    Charles F. Caldwell argued the cause for intervenors SFPP,
    L.P. and the Association of Oil Pipe Lines in support of
    respondent. With him on the brief were Christopher J. Barr,
    Albert S. Tabor, Jr., Catherine O’Harra, Steven H. Brose,
    Timothy M. Walsh, and Daniel J. Poynor.
    Steven A. Adducci, R.Gordon Gooch, Elisabeth R. Myers,
    Marcus W. Sisk, Jr., Frederick G. Jauss IV., and George L.
    Weber were on the brief of Shipper Intervenors in support of
    respondent with respect to arguments of SFPP, L.P. and the
    Association of Oil Pipe Lines.
    Before: SENTELLE, GRIFFITH and KAVANAUGH, Circuit
    Judges.
    Opinion for the Court filed PER CURIAM.
    3
    PER CURIAM: SFPP, L.P., operates pipelines that transport
    petroleum products through Arizona, California, Nevada, New
    Mexico, Oregon, and Texas. This case is the latest chapter in a
    long-running dispute over SFPP’s tariffs.
    The consolidated petitions for review challenge three orders
    of the Federal Energy Regulatory Commission (“FERC”):
    1.   ARCO Products Co. v. SFPP, L.P., 
    92 FERC ¶ 61,244
    (2000) (“Order Consolidating Proceedings”);
    2.   ARCO Products Co. v. SFPP, L.P., 
    106 FERC ¶ 61,300
    (2004) (“Order on Initial Decision”); and
    3.   SFPP, L.P., 
    111 FERC ¶ 61,334
     (2005) (“Remand
    Order”).
    Several shippers – i.e., firms that pay to transport petroleum
    products over SFPP’s pipelines – seek review of these three
    orders. The shipper petitioners are BP West Coast Products,
    Chevron Products, ConocoPhillips, ExxonMobil Oil, Navajo
    Refining, Ultramar, Valero Marketing and Supply, and Western
    Refining. The shippers raise several challenges to the
    Commission’s orders. In particular, they argue that: (1) the
    Commission unlawfully granted an income tax allowance to
    SFPP; (2) the Commission applied the wrong standard and
    relied upon faulty data in its analysis of whether SFPP’s rates
    should be “de-grandfathered” under the Energy Policy Act of
    1992; and (3) the Commission erroneously held that certain
    shippers were not entitled to reparations for rates charged on
    SFPP’s East Line after August 1, 2000. SFPP and the
    Association of Oil Pipe Lines have intervened on behalf of the
    Commission with respect to these issues.
    4
    SFPP and the Association of Oil Pipe Lines have also cross-
    petitioned for review of the three challenged orders. They argue
    that the Commission incorrectly interpreted the Energy Policy
    Act and made several computational errors in determining
    whether SFPP’s rates should be de-grandfathered. The shippers
    have intervened on behalf of the Commission regarding these
    issues.
    We deny the petitions for review with respect to the income
    tax allowance issues and the Energy Policy Act issues. We hold
    that the Commission’s income tax allowance policy was not
    arbitrary or capricious or contrary to law. We also hold that
    FERC’s interpretation of the Energy Policy Act was reasonable.
    We need not consider several of the arguments raised by SFPP
    and the shippers regarding FERC’s calculations because the
    parties failed to raise those arguments before the Commission in
    the first instance. However, we grant the shippers’ petition for
    review with respect to the reparations issue. FERC acted
    contrary to law when it held that the Arizona Grocery doctrine
    precluded the Commission from awarding reparations to East
    Line shippers for rates paid after August 1, 2000.
    I. FERC’S INCOME TAX ALLOWANCE POLICY
    The first issue in these petitions for review is whether it was
    lawful for FERC to grant an income tax allowance to pipelines
    operating as limited partnerships. In the Remand Order, FERC
    held that SFPP is entitled to an income tax allowance to the
    extent that its partners incur “actual or potential income tax
    liability” on the income they receive from the partnership.
    SFPP, L.P., 
    111 FERC ¶ 61,334
     at 62,456 (2005). The shipper
    petitioners contend that this order is arbitrary and capricious and
    contrary to our decision in BP West Coast Products, LLC v.
    FERC, 
    374 F.3d 1263
     (D.C. Cir. 2004), because it grants a tax
    5
    allowance to entities that do not actually pay income taxes.
    While we agree that the orders under review and the policy
    statement upon which they are based incorporate some of the
    troubling elements of the phantom tax we disallowed in BP West
    Coast, FERC has justified its new policy with reasoning
    sufficient to survive our review. We therefore deny the petitions
    for review with respect to this issue.
    A.
    FERC’s income tax allowance (“ITA”) policy for pipelines
    that operate as limited partnerships has a tortuous history. In
    1995, the Commission adopted the “Lakehead policy,” under
    which pipelines’ ITA eligibility turned on whether the partners
    were corporations or individuals. Lakehead Pipe Line Co., 
    71 FERC ¶ 61,338
     at 62,313-15 (1995). In Lakehead, FERC held
    that a pipeline was entitled to an ITA only for income taxes that
    were “attributable to its corporate partners.” 
    Id. at 62,314
    . The
    Commission reasoned:
    When partnership interests are held by corporations, the
    partnership is entitled to a tax allowance in its cost-of-
    service for those corporate interests because the tax cost
    will be passed on to the corporate owners who must pay
    corporate income taxes on their allocated share of income
    directly on their tax returns. The partnership is in essence
    a division of each of its corporate partners because the
    partnership functions as a conduit for income tax purposes.
    
    Id. at 62,314-15
    . In contrast, FERC held that pipelines were not
    entitled to an ITA with respect to income attributable to
    partnership interests held by individuals because “those
    individuals do not pay a corporate income tax.” 
    Id. at 62,315
    .
    The Commission noted that its holding “comports with the
    principle that there should not be an element in the cost-of-
    6
    service to cover costs that are not incurred.” 
    Id.
    In the Opinion No. 435 proceedings, FERC applied the
    Lakehead policy to SFPP’s rates, holding that SFPP could
    include an income tax allowance in its cost-of-service for the
    share of the partnership’s income that was attributable to
    corporate partners. SFPP, L.P., 
    86 FERC ¶ 61,022
     at 61,102-04
    (1999). Several parties petitioned for review of this order. The
    shipper petitioners argued – as they do in the instant case – that
    SFPP should not be entitled to any income tax allowance
    because it is a limited partnership that pays no income tax at the
    entity level. In contrast, SFPP argued that it should have been
    granted a full income tax allowance, even on the share of
    income attributable to non-corporate partners.
    In BP West Coast, we granted the shippers’ petition for
    review and vacated the income tax allowance provisions of
    Opinion No. 435. 
    374 F.3d at 1285-93
    . We held that:
    [T]he Commission’s opinions in Lakehead do not evidence
    reasoned decisionmaking for their inclusion in cost of
    service of corporate tax allowances for corporate unit
    holders, but denial of individual tax allowances reflecting
    the liability of individual unit holders.
    
    Id. at 1290
    . In other words, the Commission did not reasonably
    explain why corporate partners and individual partners were
    treated differently under the Lakehead policy. 
    Id. at 1288-90
    .
    We acknowledged that corporate income is taxed twice – while
    other income is taxed only once – but we emphasized that this
    discrepancy is simply “a product of the corporate form.” 
    Id. at 1290-91
    . FERC may not attempt to compensate for the double
    taxation of corporations by creating a “phantom” tax allowance.
    As we explained:
    7
    [W]here there is no tax generated by the regulated entity,
    either standing alone or as part of a consolidated corporate
    group, the regulator cannot create a phantom tax in order to
    create an allowance to pass through to the rate payer.
    
    Id. at 1291
    . Income tax costs are “no different” than any other
    costs, such as bookkeeping expenses. 
    Id.
     We noted that just as
    a pipeline does not receive an allowance for the bookkeeping
    costs of its investors, neither may it receive an allowance for
    income taxes paid by “corporate unit holders” (i.e., investors).
    
    Id.
     In sum, our per curiam decision in BP West Coast vacated
    FERC’s Lakehead policy because the Commission did not
    provide a reasoned explanation for distinguishing between
    individual and corporate partners, and because the Commission
    appeared to be granting income tax allowances to regulated
    entities that did not actually pay income taxes.
    In response to our decision in BP West Coast, the
    Commission issued a notice of inquiry seeking comments from
    interested parties on the question when, if ever, it is appropriate
    to provide an income tax allowance for partnerships or similar
    pass-through entities that hold interests in a regulated public
    utility. Inquiry Regarding Income Tax Allowances; Request for
    Comments, 
    69 Fed. Reg. 72,188
     (Dec. 13, 2004). On May 4,
    2005, the Commission issued a policy statement that provided
    guidance about how it planned to address the ITA issue going
    forward. Policy Statement on Income Tax Allowances, 
    111 FERC ¶ 61,139
     (2005) (“Policy Statement”). In the Policy
    Statement, the Commission concluded that “such an allowance
    should be permitted on all partnership interests, or similar legal
    interests, if the owner of that interest has an actual or potential
    income tax liability on the public utility income earned through
    the interest.” 
    Id. at 61,736
    . In response to its request for
    comments, the Commission received 42 responses. 
    Id. at 61,737
    . After review of the comments, the Commission
    8
    determined that it should choose one of four possible
    approaches:
    (1) provide an income tax allowance only to corporations,
    but not partnerships; (2) give an income tax allowance to
    both corporations and partnerships; (3) permit an allowance
    for partnerships owned only by corporations; and (4)
    eliminate all income tax allowances and set rates based on
    a pre-tax rate of return.
    
    Id. at 61,741
    . The Commission ultimately selected the second
    option, stating that it would “permit an income tax allowance for
    all entities or individuals owning public utility assets, provided
    that an entity or individual has an actual or potential income tax
    liability to be paid on that income from those assets.” 
    Id.
     After
    weighing the relevant policy concerns, FERC concluded that
    this policy “serves the public because it allows rate recovery of
    the income tax liability attributable to regulated utility income,
    facilitates investment in public utility assets, and assures just
    and reasonable rates.” 
    Id. at 61,736
    .
    The Commission applied its new policy and reiterated its
    reasoning in the Remand Order. 111 FERC at 62,454-56. In
    that order, FERC ruled that SFPP was entitled to an ITA to the
    extent that the pipeline’s partners – both individual and
    corporate – paid taxes on the income they received from the
    partnership. 
    Id. at 62,455-56
    . The Commission acknowledged
    that “the pass-through entity does not itself pay income taxes,”
    but nonetheless granted the ITA because “the owners of a pass-
    through entity pay income taxes on the utility income generated
    by the assets they own via the device of the pass-through entity.”
    
    Id. at 62,455
    . FERC reasoned that:
    9
    [J]ust as a corporation has an actual or potential income tax
    liability on income from the public utility assets it controls,
    so do the owners of a partnership or limited liability
    corporation (LLC) on the assets and income that they
    control by means of the pass-through entity.
    
    Id.
     Thus, the Commission concluded that “SFPP, L.P. should be
    afforded an income tax allowance on all of its partnership
    interests to the extent that the owners of those interests had an
    actual or potential income tax liability during the periods at
    issue.” 
    Id. at 62,456
    .
    ExxonMobil Oil, BP West Coast Products, Navajo Refining
    Company, and other shippers have petitioned for review of the
    Remand Order, arguing that FERC’s decision to grant SFPP an
    income tax allowance was arbitrary and capricious and contrary
    to our decision in BP West Coast. The Policy Statement is not
    directly challenged in these petitions for review. However, in
    the Remand Order – which is challenged in the instant case – the
    Commission expressly relied upon the conclusions and
    reasoning of the Policy Statement. See 111 FERC at 62,456
    (“Given the Commission’s Policy Statement and the application
    of its policy in this opinion, the Commission concludes that
    SFPP, L.P. should be afforded an income tax allowance . . . .”).
    Thus, in determining whether the Remand Order was arbitrary
    and capricious or contrary to BP West Coast, we necessarily
    review the Commission’s conclusions and reasoning in the
    Policy Statement.
    B.
    In the Remand Order, FERC resolved the principal defect
    of the Lakehead policy, which was the inadequately explained
    differential treatment of the tax liability of individual and
    corporate partners. The Commission concluded that regulated
    10
    pipelines operating as limited partnerships should be eligible for
    income tax allowances to the extent that all partners incur actual
    or potential tax liability on the income they receive from the
    partnership. FERC’s explanation in support of this policy
    choice is reasonable, and the Commission’s Remand Order is
    not inconsistent with BP West Coast. Accordingly, we deny the
    petitions for review with respect to this issue.
    We review the Commission’s ratemaking decisions under
    the “arbitrary and capricious” standard. Ass’n of Oil Pipe Lines
    v. FERC, 
    83 F.3d 1424
    , 1431 (D.C. Cir. 1996) (“AOPL”).
    Under this test, FERC’s decisions will be upheld as long as the
    Commission has examined the relevant data and articulated a
    rational connection between the facts found and the choice
    made. 
    Id.
     (quoting Motor Vehicle Mfrs. Ass’n v. State Farm
    Mut. Auto. Ins. Co., 
    463 U.S. 29
    , 43 (1983)). In other words, the
    Commission must “cogently explain why it has exercised its
    discretion in [the] given manner.” Exxon Corp. v. FERC, 
    206 F.3d 47
    , 54 (D.C. Cir. 2000) (internal quotation marks omitted)
    (alteration in original). In reviewing FERC’s orders, we are
    “particularly deferential to the Commission’s expertise” with
    respect to ratemaking issues. AOPL, 
    83 F.3d at 1431
    ; see also
    FPC v. Hope Natural Gas Co., 
    320 U.S. 591
    , 602 (1944) (noting
    that a party challenging a natural gas rate order “carries the
    heavy burden of making a convincing showing that it is invalid
    because it is unjust and unreasonable”).
    The Commission must ensure that the rates charged by
    jurisdictional pipelines are “just and reasonable.” BP West
    Coast, 
    374 F.3d at 1286
     (citation omitted). We have held that
    “just and reasonable” rates are “rates yielding sufficient revenue
    to cover all proper costs, including federal income taxes, plus a
    specified return on invested capital.” City of Charlottesville v.
    FERC, 
    774 F.2d 1205
    , 1207 (D.C. Cir. 1985). Of course, this
    canonical principle of ratemaking begs the question of which
    11
    costs are “proper.” In the challenged Remand Order, FERC
    concluded that it was proper to grant SFPP an income tax
    allowance to the extent that its partners – both individual and
    corporate – incurred actual or potential tax liability on their
    distributive share of the partnership income. In light of the
    deference we extend to the Commission’s judgments regarding
    ratemaking issues, we cannot hold that this conclusion was
    arbitrary or capricious.
    On remand from BP West Coast, the Commission
    considered four different options for its income tax allowance
    policy. First, the Commission considered – and rejected – a
    proposal to adopt a modified version of the Lakehead policy. As
    FERC explained in the Policy Statement, “the Commission
    agrees with the court’s conclusion in BP West Coast that . . .
    Lakehead did not articulate a rational ground for concluding that
    there should be no tax allowance on partnership interests owned
    by individuals, but that there should be one for partnership
    interests owned by corporations.” 111 FERC at 61,743. Given
    our holding in BP West Coast, the Commission was certainly
    permitted – if not required – to reject the comments that
    proposed a modified Lakehead policy. Second, FERC
    considered a proposal that would grant income tax allowances
    only to partnerships that are “owned wholly by corporations
    filing a consolidated return.” Id. at 61,738. FERC reasonably
    rejected this for the same reason it rejected the first alternative
    – because it found no rational reason for differentiating between
    corporate and non-corporate partnership interests. Id. at 61,744.
    The two remaining policy options considered by the
    Commission were polar opposites. One proposal would have
    categorically prohibited limited partnerships from taking income
    tax allowances, while the other would have granted partnerships
    a full income tax allowance to the extent that the partners incur
    actual or potential tax liability. Id. at 61,739-41. The
    12
    Commission chose to adopt a policy of full income tax
    allowances for limited partnerships, and we cannot conclude that
    this choice was unreasonable. Most importantly, FERC
    determined that income taxes paid by partners on their
    distributive share of the pipeline’s income are “just as much a
    cost of acquiring and operating the assets of that entity as if the
    utility assets were owned by a corporation.” Id. at 61,742. In
    other words, the Commission found no good reason to limit the
    income tax allowance to corporations, given that “both partners
    and Subchapter C corporations pay income taxes on their first
    tier income.” Id. at 61,744.
    Moreover, the Commission determined that income taxes
    paid on the partners’ distributive share of the pipeline’s income
    were properly “attributable” to the regulated entity because such
    taxes must be paid regardless of whether the partners actually
    receive a cash distribution. See United States v. Basye, 
    410 U.S. 441
    , 453 (1973) (“[I]t is axiomatic that each partner must pay
    taxes on his distributive share of the partnership’s income
    without regard to whether that amount is actually distributed to
    him.”). Based on this aspect of partnership law, FERC
    concluded that income taxes paid by investors in a limited
    partnership are “first-tier” taxes that may be allocated to the
    regulated entity’s cost-of-service. The shipper petitioners argue
    that these taxes are ultimately paid by individual investors – not
    the pipeline – and thus it was improper for FERC to grant an
    ITA to the regulated entity. However, the Commission
    reasonably addressed this concern, explaining:
    Because public utility income of pass-through entities is
    attributed directly to the owners of such entities and the
    owners have an actual or potential income tax liability on
    that income, the Commission concludes that its rationale
    here does not violate the court’s concern that the
    Commission had created a tax allowance to compensate for
    13
    an income tax cost that is not actually paid by the regulated
    utility.
    Policy Statement, 111 FERC at 61,742.
    FERC also emphasized that “the return to the owners of
    pass-through entities will be reduced below that of a corporation
    investing in the same asset if such entities are not afforded an
    income tax allowance on their public utility income.” 
    Id.
     The
    Commission determined that “termination of the allowance
    would clearly act as a disincentive for the use of the partnership
    format,” because it would lower the returns of partnerships vis-
    a-vis corporations, and because it would prevent certain
    investors from realizing the benefits of a consolidated income
    tax return. 
    Id.
     We cannot hold that these conclusions were
    unreasonable. It has long been established that “the return to the
    equity owner should be commensurate with returns on
    investments in other enterprises having corresponding risks.”
    Hope Natural Gas, 
    320 U.S. at 603
    . In the Policy Statement,
    FERC concluded that it would be inequitable to grant a full
    income tax allowance to corporations while denying a similar
    allowance to limited partnerships. 111 FERC at 61,740, 61,742.
    For example, if the corporate tax rate is 35%, then a pipeline that
    operates as a corporation is permitted to charge a rate of $154 in
    order to earn after-tax income of $100. As several commenters
    pointed out, “if an income tax allowance is not allowed the
    partnership, then the partners must pay a $35 income tax on
    $100 of utility income, leaving them with only an after-tax
    return of $65.” 
    Id.
     Based on these comments, the Commission
    determined that pipelines operating as limited partnerships
    should receive a full income tax allowance in order to maintain
    parity with pipelines that operate as corporations. This
    conclusion was not unreasonable, and we defer to FERC’s
    expert judgment about the best way to equalize after-tax returns
    for partnerships and corporations.
    14
    In sum, policy choices about ratemaking are the
    responsibility of the Commission – not this Court. See AT&T
    Corp. v. FCC, 
    220 F.3d 607
    , 631 (D.C. Cir. 2000) (noting that
    “policy judgment[s]” are “for the agency – not this court – to
    make”). Our role as a reviewing court is limited to ensuring that
    “the Commission’s decisionmaking is reasoned, principled, and
    based upon the record.” So. Cal. Edison Co. v. FERC, 
    443 F.3d 94
    , 98 (D.C. Cir. 2006) (quoting Williston Basin Interstate
    Pipeline Co. v. FERC, 
    165 F.3d 54
    , 60 (D.C. Cir. 1999)). Here,
    the conclusions reached in the Policy Statement and the Remand
    Order were within the scope of the Commission’s discretion
    with respect to ratemaking issues. We held in City of
    Charlottesville that regulated entities are entitled to recover all
    “proper” costs from their ratepayers. 
    774 F.2d at 1207
    .
    Obviously, “proper” is not a self-defining term, and the
    Commission thus has broad discretion to determine which costs
    may be recovered through a pipeline’s rates. Here, FERC has
    reasonably explained why income taxes paid on partnership
    income are properly allocated to the regulated entity for
    ratemaking purposes, and the shipper petitioners have offered no
    compelling reason to second-guess the agency’s policy choices.
    ***
    Petitioners argue that regardless of whether FERC’s new
    ITA policy is reasonable, the Remand Order must be set aside
    because it is inconsistent with our opinion in BP West Coast.
    We disagree.
    At the outset, we note that BP West Coast did not
    categorically prohibit the Commission from granting income tax
    allowances to pipelines that operate as limited partnerships. We
    granted the shippers’ petition for review in that case primarily
    because of the Commission’s inadequately justified differential
    treatment of individual partners and corporate partners. As we
    15
    explained, “the Commission’s opinions in Lakehead do not
    evidence reasoned decisionmaking for their inclusion in cost of
    service of corporate tax allowances for corporate unit holders,
    but denial of individual tax allowances reflecting the liability of
    individual unit holders.” BP West Coast, 
    374 F.3d at 1290
    . The
    Commission has now chosen to treat all income taxes alike,
    regardless of whether they are incurred by individual partners or
    corporate partners. See Remand Order, 111 FERC at 62,455
    (conceding that “Lakehead mistakenly focused on who pays the
    taxes rather than on the more fundamental cost allocation
    principle of what costs, including tax costs, are attributable to
    regulated service, and therefore properly included in a regulated
    cost of service”). BP West Coast did not pass upon the specific
    question at issue in the instant case – whether FERC may grant
    an ITA to limited partnerships for the income taxes paid by all
    partners on the income they receive from the partnership. It is
    a basic tenet of administrative law that when an agency action
    is found to be arbitrary and capricious because of a failure to
    exercise reasoned decisionmaking, the agency is free to adopt a
    new policy on remand, provided it supplies a reasoned
    explanation for its actions. See SEC v. Chenery Corp., 
    332 U.S. 194
    , 200-01 (1947) (holding that when a court sets aside an
    agency order as “unsupportable for the reasons supplied by that
    agency,” the agency is “bound to deal with the problem afresh”
    on remand).
    Petitioners also argue that limited partnerships do not pay
    entity-level income taxes, and thus FERC’s new ITA policy
    disregards our statement in BP West Coast that “the regulator
    cannot create a phantom tax in order to create an allowance to
    pass through to the rate payer.” 
    374 F.3d at 1291
    . While not
    without force, this argument cannot ultimately prevail, for two
    reasons. First, as FERC explained in the Policy Statement and
    the Remand Order, the income taxes for which SFPP will
    receive an income tax allowance are real, albeit indirect. SFPP
    16
    will be eligible for a tax allowance only to the extent it can
    demonstrate – in a rate proceeding – that its partners incur
    “actual or potential” income tax liability on their respective
    shares of the partnership income. Remand Order, 111 FERC at
    62,456. Second, when we used the term “phantom tax” in BP
    West Coast, we were reviewing a very different set of orders
    than the ones at issue here. In BP West Coast, we vacated the
    Lakehead policy because the Commission had offered no
    reasoning to support its distinction between corporate partners
    and individual partners. 
    374 F.3d at 1290
     (“This does not
    supply reasoning for differentiating between individual and
    corporate tax liability. It is merely restating the proposition that
    the Commission is so differentiating.”). However, in the instant
    case FERC has gone to great lengths to explain why the taxes in
    question are not “phantom” and are properly attributed to the
    regulated entity. And there is at least one aspect of partnership
    law that supports FERC’s conclusion but was not advanced by
    the Commission in BP West Coast – investors in a limited
    partnership are required to pay tax on their distributive shares of
    the partnership income, even if they do not receive a cash
    distribution. See Basye, 
    410 U.S. at 454
    . As explained above,
    this supports FERC’s determination that taxes on the income
    received from a limited partnership should be allocated to the
    pipeline and included in the regulated entity’s cost-of-service.
    In this sense, petitioners’ likening of partnership tax to
    shareholder dividend tax is inapposite because a shareholder of
    a corporation is generally taxed on the amount of the cash
    dividend actually received. In sum, in the Policy Statement and
    the Remand Order, FERC has reasonably explained why its new
    ITA policy does not result in the creation of “phantom” tax
    liability for regulated pipelines that operate as limited
    partnerships. The same cannot be said for the Lakehead policy
    that we vacated in BP West Coast.
    17
    Shipper petitioners also emphasize that in BP West Coast
    we rejected SFPP’s argument that the Commission should have
    adopted a full income tax allowance for limited partnerships.
    Petitioners argue that this holding is now the “law of the case,”
    because the instant case involves the same issue that was
    litigated – and resolved in the shippers’ favor – in the earlier
    proceeding. Again, we disagree. In BP West Coast, SFPP
    cross-petitioned for review of the Lakehead policy. Like the
    shipper petitioners, SFPP argued that the Commission’s
    distinction between corporate partners and individual partners
    was unsupportable. 
    374 F.3d at 1291
    . However, while the
    shipper petitioners argued that FERC should not have permitted
    any income tax allowance, SFPP argued that FERC should have
    granted a full ITA to pipelines operating as limited partnerships.
    We rejected SFPP’s argument in BP West Coast, but petitioners
    now read too much into our holding with respect to this issue.
    All we held in BP West Coast is that the Commission was not
    required to grant a full income tax allowance to pipelines that
    operate as limited partnerships. Petitioners’ argument assumes
    that “not required” is synonymous with “prohibited.” To the
    contrary, when an agency has broad discretion to choose among
    different policy options, the fact that any one option is not
    required certainly does not mean that it is prohibited. Arguably,
    a fair return on equity might have been afforded if FERC had
    chosen the fourth alternative of computing return on pretax
    income and providing no tax allowance at all for the pipeline
    owners. This, however, is a policy decision rejected by FERC.
    As we noted above, policy decisions are for the Commission and
    not the court.
    ***
    In conclusion, we deny the petitions for review with respect
    to the income tax allowance issue. Under the arbitrary and
    capricious test, our standard of review is “only reasonableness,
    18
    not perfection.” Kennecott Greens Creek Min. Co. v. MSHA,
    
    476 F.3d 946
    , 954 (D.C. Cir. 2007). We need not decide
    whether the Commission has adopted the best possible policy as
    long as the agency has acted within the scope of its discretion
    and reasonably explained its actions. In the Policy Statement
    and the Remand Order, the Commission resolved the principal
    defect of the Lakehead policy, which was the unexplained
    differential treatment of individual and corporate partners.
    FERC then determined that it would be “just and reasonable” to
    grant regulated pipelines an income tax allowance to the extent
    that all of the pipeline’s partners – whether individual or
    corporate – incur actual or potential tax liability. The
    Commission reasonably determined that such taxes are
    “attributable” to the regulated entity, given that partners must
    pay tax on their share of the partnership income regardless of
    whether they actually receive a cash distribution. Additionally,
    the Commission reasonably relied upon evidence that a full
    income tax allowance is necessary to ensure that corporations
    and partnerships of like risk will earn comparable after-tax
    returns. Lastly, in the income tax allowance Policy Statement,
    FERC explained in detail why it chose to reject the other three
    policy options proposed by commenters. We cannot hold that
    the Commission’s policy choices were arbitrary and capricious.
    Accordingly, we deny the petitions for review with respect to
    this issue.
    II. ENERGY POLICY ACT ISSUES
    Both sets of petitioners argue that FERC misinterpreted §
    1803 of the Energy Policy Act of 1992. This provision
    grandfathers certain oil pipeline rates as they existed at the time
    of the Act’s enactment. Under this statute, shippers can
    challenge these grandfathered rates when “a substantial change
    has occurred after the date of the enactment of [the EPAct] . . .
    19
    in the economic circumstances of the oil pipeline which were a
    basis for the rate.” FERC interpreted § 1803 to allow rate
    challenges when there has been a substantial change in a
    pipeline’s overall rate of return. Shipper petitioners argue that
    this interpretation grandfathers too many rates; they contend that
    a substantial change in any one cost element, even if offset by
    other changes such that the overall rate of return is unaffected,
    subjects a rate to challenge under § 1803. From the other
    direction, pipeline petitioners contend that FERC’s
    interpretation grandfathers too few rates; they argue that the
    correct standard should take account of factors in addition to a
    pipeline’s costs. FERC has rejected the diametrically opposed
    arguments of the petitioners and interpreted the statutory text to
    establish a middle ground between those two competing
    positions. We hold that FERC’s interpretation is reasonable.
    A.
    Federal regulation of oil pipelines began in 1906, when
    Congress passed the Hepburn Act. That statute applied the
    Interstate Commerce Act (ICA) to oil pipelines and gave the
    Interstate Commerce Commission jurisdiction over the
    pipelines. Pub. L. No. 59-337, § 1, 
    34 Stat. 584
    , 584. In 1977,
    Congress transferred responsibility for oil pipeline regulation to
    the newly created FERC. Department of Energy Reorganization
    Act, Pub. L. No. 95-91, § 402(b), 
    91 Stat. 565
    , 584. The
    following year, Congress comprehensively revised the ICA but
    provided that its 1977 provisions would continue to govern
    FERC’s regulation of oil pipelines.1 Act of Oct. 17, 1978, Pub
    L. No. 95-473, § 4(c), 
    92 Stat. 1337
    , 1470.
    1
    As a result, the older version of the ICA was reprinted in the
    appendix to Title 49 of the United States Code. Because newer
    editions of the Code do not include the ICA, however, all citations to
    the ICA in this opinion refer to the 1988 U.S. Code.
    20
    The ICA prohibits pipelines from charging rates that are
    “unjust or unreasonable” and permits shippers to challenge both
    pre-existing and newly filed rates. 49 U.S.C. app. §§ 13(1),
    15(1), (7). FERC has generally approved just and reasonable
    rates based primarily on a pipeline’s costs. See Frontier
    Pipeline Co. v. FERC, 
    452 F.3d 774
    , 776 (D.C. Cir. 2006)
    (citing Ass’n of Oil Pipe Lines v. FERC, 
    83 F.3d 1424
    , 1428-29
    (D.C. Cir. 1996); Farmers Union Cent. Exch. v. FERC, 
    734 F.2d 1486
    , 1495-96 (D.C. Cir. 1984); Farmers Union Cent. Exch. v.
    FERC, 
    584 F.2d 408
    , 412-22 (D.C. Cir. 1978)). In Opinion No.
    154-B, issued in 1985, FERC adopted the “trended original cost”
    (or “TOC”) method for ratemaking, in which asset depreciation
    and equity recovery are smoothed out over the lifetime of a
    pipeline in order to avoid excessively high rates at the front end,
    thereby encouraging new market entrants. See Williams Pipe
    Line Co., 
    31 FERC ¶ 61,377
     at 61,833 (1985); BP West Coast
    Prods., LLC v. FERC, 
    374 F.3d 1263
    , 1282-83 (D.C. Cir. 2004).
    In 1992, Congress enacted the Energy Policy Act (EPAct).
    Pub. L. No. 102-486, 
    106 Stat. 2776
    . In Title 18 of that Act,
    called “Oil Pipeline Regulatory Reform,” Congress sought to
    simplify ratemaking procedures for oil pipelines; this would
    reduce administrative and litigation costs for pipelines and
    shippers. See 
    id. at 3010-12
     (codified at 
    42 U.S.C. § 7172
     note);
    Ass’n of Oil Pipe Lines v. FERC, 
    83 F.3d 1424
    , 1429 (D.C. Cir.
    1996). Section 1801 of the EPAct directed FERC to “issue a
    final rule which establishes a simplified and generally applicable
    ratemaking methodology for oil pipelines” within one year of
    the passage of the Act. 106 Stat. at 3010. Section 1802 required
    FERC to “issue a final rule to streamline procedures . . . relating
    to oil pipeline rates in order to avoid unnecessary regulatory
    costs and delays” within 18 months. Id. The goal of these
    provisions was to decrease the costs associated with
    administrative proceedings and litigation involving oil pipeline
    rates.
    21
    FERC implemented those mandates in Order No. 561 by
    establishing an indexed cap system, in which the maximum
    permissible rates for pipelines are adjusted annually to reflect
    predictions of industry-wide changes in costs. See Revisions to
    Oil Pipeline Regulations Pursuant to the Energy Policy Act of
    1992, Order No. 561, FERC Stats. & Regs. ¶ 30,985, 
    58 Fed. Reg. 58,753
     (1993); Order No. 561-A, FERC Stats. & Regs. ¶
    31,000, 
    59 Fed. Reg. 40,243
     (1994). A pipeline may charge a
    rate above the applicable cap only if there is a “substantial
    divergence” between the cap and its actual costs, if it shows that
    it lacks “significant market power,” or if all of its customers
    consent. 
    18 C.F.R. § 342.4
    .
    We upheld this scheme in Association of Oil Pipe Lines v.
    FERC. 
    83 F.3d at 1428
    . We have explained that the primary
    benefits of the cap system are that it “dispenses with intricate
    calculations of specific pipeline costs” and encourages pipelines
    to develop “cost-reducing innovations” because any given
    pipeline’s cost-cutting is unlikely to affect the industry-wide
    cap. Frontier Pipeline Co., 
    452 F.3d at 777
    .
    In keeping with its general purpose to reduce costs from
    administrative proceedings and litigation associated with the
    regulation of oil pipelines, the EPAct also includes a
    “grandfathering” provision that insulates certain pre-existing
    pipeline rates from challenge even if the rates exceed the
    appropriate indexed cap. Section 1803(a) provides that any rate
    in effect for the full year ending on the date of the enactment of
    the EPAct (October 24, 1992) is just and reasonable unless it
    had been subject to protest, investigation, or complaint during
    that one-year period. Under § 1803(b), a grandfathered rate can
    be challenged as not just and reasonable – “de-grandfathered” –
    if “evidence is presented to the Commission which establishes
    that a substantial change has occurred after the date of the
    enactment of this Act – (A) in the economic circumstances of
    22
    the oil pipeline which were a basis for the rate; or (B) in the
    nature of the services provided which were a basis for the rate”
    (emphasis added). Thus, under § 1803, “the analysis of a
    pipeline rate challenge . . . proceeds in two steps: first, FERC
    determines whether the rate in question is grandfathered; if it is,
    FERC then asks whether the rate falls within either of the
    exceptions outlined in Section 1803(b).” BP West Coast, 
    374 F.3d at 1272
    .
    The background to this litigation is complex. Since the
    EPAct went into effect in 1992, shippers have asked FERC to
    declare that SFPP’s lines either did not qualify for
    grandfathering or should be de-grandfathered due to
    substantially changed circumstances.
    Docket No. OR92-8 (1992-1995). In Docket No. OR92-8,
    addressing complaints filed between 1992 and August 1995,
    FERC determined that SFPP’s West Line rates were (with one
    exception) grandfathered, but that its East Line rates were not.
    SFPP, L.P., Opinion No. 435-A, 
    91 FERC ¶ 61,135
     at 61,499
    (2000); BP West Coast, 
    374 F.3d at 1281
    . We affirmed FERC’s
    conclusion with respect to the West Line in BP West Coast
    Products, LLC v. FERC (the East Line analysis was not
    challenged). 
    374 F.3d at 1278, 1282
    . In that same docket,
    FERC also determined that the West Line had not experienced
    substantially changed circumstances necessary to de-grandfather
    its rates, despite the fact that FERC’s new Lakehead policy had
    altered the income tax allowances SFPP could include in its
    rates. See Lakehead Pipe Line Co., L.P., 
    71 FERC ¶ 61,338
    (1995); Opinion No. 435-A, 91 FERC at 61,499; BP West Coast,
    
    374 F.3d at 1280
    . In BP West Coast, we did not need to reach
    the question of substantially changed circumstances on the West
    Line because we held that the Lakehead policy itself was
    defective. 
    374 F.3d at 1280
    . We therefore remanded the issue
    to FERC.
    23
    Docket No. OR96-2 (1995-2000). While the BP West Coast
    appeal was pending, FERC consolidated in Docket No. OR96-2
    shipper complaints filed between August 1995 and August 2000.
    In March 2004, three months before we announced our decision
    in BP West Coast, FERC held that the West Line had
    experienced substantially changed circumstances and thus its
    rates were de-grandfathered. ARCO Prods. Co. v. SFPP, L.P.,
    
    106 FERC ¶ 61,300
     at 62,148 (2004) (“Order on Initial
    Decision”). In the same order, FERC held that SFPP’s North
    and Oregon Lines had not experienced substantially changed
    circumstances, reversing an ALJ decision to the contrary. 
    Id. at 62,153
    . FERC explained that the ALJ had wrongly found
    substantially changed circumstances solely because SFPP’s tax
    allowance – only one factor in its total costs – had changed due
    to the Lakehead policy. 
    Id. at 62,144
    . Instead, the Commission
    explained, the ALJ should have considered whether SFPP’s total
    costs on those lines had substantially changed. 
    Id.
     In other
    words, even if SFPP’s tax liability had significantly decreased,
    if its overall cost of service remained roughly the same due to
    other cost increases, there would not be substantially changed
    circumstances. FERC analyzed the change in total costs on the
    West, North, and Oregon Lines, and found that only the West
    Line had experienced substantially changed circumstances. 
    Id. at 62,148-50
    .
    June 2005 Remand Order. In June 2005, eleven months
    after our remand order in BP West Coast, FERC issued an order
    that served both as a remand order from BP West Coast
    (addressing Docket No. OR92-8) and as a decision on appeal in
    Docket No. OR96-2. SFPP, L.P., 
    111 FERC ¶ 61,334
     (2005)
    (“Remand Order”). In that order, FERC re-calculated whether
    there had been substantially changed circumstances on SFPP’s
    lines in light of its new adoption of a full income tax allowance
    policy (see Part I above). After making these calculations,
    24
    FERC reaffirmed its determinations that the West Line was
    de-grandfathered but that the North and Oregon Lines were not.
    
    Id. at 62,458-59
    .
    Both SFPP (with the Association of Oil Pipe Lines) and its
    shippers petitioned this Court for review, each believing that the
    Commission’s standard for determining substantially changed
    circumstances is incorrect. Both sets of petitioners also allege
    in their petitions that FERC erred in some of its calculations for
    determining whether SFPP’s lines had experienced substantially
    changed circumstances. We have jurisdiction under 49 U.S.C.
    app. § 17(10) (1988).
    B.
    Both sets of petitioners challenge FERC’s interpretation of
    the statutory phrase “a substantial change has occurred after the
    date of the enactment of this Act . . . in the economic
    circumstances of the oil pipeline which were a basis for the
    rate.” FERC interpreted that phrase to mean a change in a
    pipeline’s total cost of service. Remand Order, 111 FERC at
    62,458-59. The shippers believe that the phrase must mean that
    any substantial change in one rate element – for example, a
    pipeline’s tax allowance – suffices to de-grandfather the rate,
    even if that change is offset by another change, such that there
    is virtually no change in the pipeline’s overall cost of service.
    For their part, SFPP and the Association of Oil Pipe Lines
    believe that the phrase must be interpreted to encompass factors
    in addition to a pipeline’s cost of service because many pipelines
    did not set the rates initially under the current cost-of-service
    method. For example, FERC approved some pipeline rates on
    the basis that a pipeline faced competition sufficient to allow the
    market, rather than a cost-of-service formula, to determine the
    rates.
    25
    Because Congress authorized FERC to adjudicate
    complaints arising out of § 1803, the Commission’s
    interpretation of § 1803 in an adjudication is entitled to Chevron
    deference. BP West Coast, 
    374 F.3d at 1272-73
    .
    FERC interprets the phrase “a substantial change has
    occurred after the date of the enactment of this Act . . . in the
    economic circumstances of the oil pipeline which were a basis
    for the rate” as requiring a substantial change in the overall rate
    of return of the pipeline, rather than in one cost element, such as
    a tax allowance. That is because, as the Commission explained,
    “there can be a very large reduction in income tax allowance . . .
    even if many of the other principal cost factors, and in fact the
    total cost-of-service, increased.” Order on Initial Decision, 106
    FERC at 62,144. In other words, it makes little sense to
    de-grandfather a rate when the pipeline is no more profitable –
    or perhaps even less profitable – than it was when the rate was
    grandfathered.
    FERC’s interpretation easily fits within the bounds of the
    statutory text. The word “circumstances” plausibly invokes a
    composite of several variables.               One definition of
    “circumstances” is “the total complex of essential attributes and
    attendant adjuncts of a fact or action: the sum of essential and
    environmental characteristics.” WEBSTER’S THIRD NEW
    INTERNATIONAL DICTIONARY 410 (1976). Another is “the
    logical surroundings or ‘adjuncts’ of an action; the time, place,
    manner, cause, occasion, etc., amid which it takes place.” 3
    OXFORD ENGLISH DICTIONARY 241 (2d ed. 1989). When
    modified by the word “economic,” the word “circumstances”
    could reasonably mean the total economic outlook of a pipeline
    – its profitability. In that case, it would be a change only in that
    overall picture, rather than in any individual part of that picture,
    that would constitute a change in “economic circumstances.” A
    straightforward reading of the statutory text, therefore,
    26
    substantially validates FERC’s interpretation.
    Moreover, FERC’s reading meshes with the purpose of the
    EPAct, as gleaned from its text and structure.               The
    grandfathering provision of § 1803 is intended to insulate
    pre-existing rates from attack by ordaining them to be
    necessarily “just and reasonable.”          The most natural
    understanding of § 1803 is that Congress believed that the
    then-existing rates of return were not so large as to justify the
    added litigation costs of subjecting the rates to agency
    evaluation and judicial review. This inference comports with
    the streamlining goals of § 1801 and § 1802. It makes good
    sense, then, to de-grandfather rates only when the rate of return
    itself has changed. It is unclear why Congress would care if the
    underlying composition of a pipeline’s costs has changed so
    long as the pipeline’s rate of return has remained constant or
    decreased.
    The shippers focus on a different word in § 1803: the
    indefinite article “a” before the phrases “substantial change” and
    “basis for the rate.” They claim that the presence of the singular
    indefinite article indicates that any substantial change in a single
    cost element must qualify as a substantial change in economic
    circumstances, even if that change is offset by other changes
    such that the pipeline’s overall return is unaffected. We
    disagree that such an interpretation is required by the text.
    FERC could reasonably conclude that the phrase “a substantial
    change . . . in the economic circumstances” means a change in
    the overall economic circumstances, not a change in one
    economic circumstance. And the phrase “a basis for the rate”
    indicates nothing more than the fact that there are other bases for
    a rate besides a pipeline’s economic circumstances. The EPAct
    even identifies another basis for a rate: “the nature of services
    provided.” EPAct, § 1803(b)(1)(B). Neither use of the
    indefinite article undermines the reasonable inference that the
    27
    term “economic circumstances” refers to a composite of several
    variables rather than any individual variable – which might be
    the case if, for instance, the statute said “an economic
    circumstance.”
    The shippers also contend that the Order on Initial Decision
    unreasonably departed from FERC’s precedent in Opinion No.
    435. Of course, FERC may not depart from its own precedent
    without a reasoned explanation. See Dominion Res., Inc. v.
    FERC, 
    286 F.3d 586
    , 592 (D.C. Cir. 2002). In Opinion No. 435,
    FERC wrote that a substantial change “could be established by
    one or a number of rate elements” and that it is unnecessary to
    “establish that there has been a substantial change to every rate
    design element.” 
    86 FERC ¶ 61,022
     at 61,066 (1999). The
    shippers believe this means that FERC concluded that a change
    in a single cost element – even absent a change in the overall
    rate of return – would qualify as a change in economic
    circumstances. It is doubtful, however, that FERC was
    considering the possibility that two or more changes could offset
    each other, which would explain why FERC discussed changes
    in terms of a single rate element. Nowhere in Opinion No. 435
    does FERC mention the possibility of offsetting. In the Order
    on Initial Decision, in contrast, FERC became aware that using
    single cost factors “could lead to anomalous results and result
    [in] a threshold that does not adequately discourage challenges
    to grandfathered oil pipeline rates.” 106 FERC at 62,151. The
    Commission therefore explained that offsetting changes would
    not count as changes in economic circumstances. See Remand
    Order, 111 FERC at 62,458-59. This decision does not appear
    to be a departure from precedent at all, but rather a clarification
    of an issue that was not on the Commission’s radar at the time
    of Opinion No. 435.
    The shippers also argue that FERC inexplicably ascribes a
    different quantitative level to the word “substantial” in
    28
    determining substantially changed circumstances under § 1803
    than it does in determining whether a pipeline’s costs have
    increased so much that the pipeline may charge a rate exceeding
    the appropriate index level. In the de-grandfathering context,
    the word “substantial” connotes a greater percentage change it
    does in the indexing context. See Texaco Refining & Marketing,
    Inc., 
    103 FERC ¶ 63,055
     at 65,151 n.29 (2003); FERC
    Supplemental Br. at 36-37. Even assuming this argument is not
    waived (as it is unclear where in the record the petitioners raised
    this point), it has no merit. The two regulatory contexts that the
    shippers seek to equate – de-grandfathering and indexing –
    implicate different regulatory interests. With indexing, FERC
    must ensure that pipelines can survive economically by
    recovering their costs. Even a small divergence between the
    index level and actual costs might thwart this goal. In contrast,
    in fleshing out the de-grandfathering standard under § 1803,
    FERC is attempting to determine when a pipeline’s costs
    diverge so much from those of the original rates that the benefits
    of grandfathering (e.g., less litigation, more certainty) no longer
    outweigh the costs to consumers. It is hardly irrational to
    ascribe different meanings to the general term “substantial” in
    those very different contexts.
    Coming from the other direction, SFPP and the Association
    of Oil Pipe Lines argue that FERC’s approach does not provide
    enough protection to grandfathered rates. They argue that
    because many of the grandfathered rates were not established
    using a cost-of-service method, that method was not a “basis”
    for those rates, and that therefore it is improper to
    de-grandfather a rate based simply on a change in its cost of
    service. SFPP points out that “[m]any rates were effectively set
    according to the informal consent or formal agreement of the
    shippers.” SFPP’s Br. at 36. Even rates that were computed
    through a cost-of-service method often utilized formulas
    different from the current method – for example, without the
    29
    income tax allowance. Moreover, beginning in the late 1980’s,
    FERC offered pipelines a market-based alternative to the
    cost-of-service method if they could demonstrate that they did
    not possess significant market power.
    A flaw in SFPP’s argument, so FERC could reasonably
    conclude, is that § 1803 does not necessarily depend on the
    method used to compute the grandfathered rate. Rather, § 1803
    assumes that the “economic circumstances” of a pipeline were
    a basis for its rate, regardless of how the rate was actually
    established. It is certainly reasonable for FERC to use a
    cost-of-service computation as an approximation for a pipeline’s
    economic circumstances; the purpose of a cost-of-service rate,
    after all, is to simulate what a pipeline’s economic behavior
    would be in a competitive market. Merely because some
    grandfathered rates were set according to non-regulated
    agreements with shippers does not mean that the pipeline’s costs
    did not indirectly influence the rate. Consequently, FERC’s
    choice appears to be a perfectly reasonable means of interpreting
    and applying § 1803.
    C.
    Both the shipper and pipeline petitioners raise a number of
    technical challenges to the method by which FERC calculated
    whether SFPP’s West, North, and Oregon lines had experienced
    substantially changed circumstances: (1) The shippers argue
    that FERC erred in using volumes as a proxy for revenues. (2)
    The shippers argue that FERC should have apportioned costs
    among different delivery points on the West Line. (3) The
    shippers argue that FERC incorrectly determined that SFPP’s
    North and Oregon Lines had not experienced substantially
    changed circumstances because FERC employed an
    inappropriate cost-of-service method. (4) SFPP and the
    Association of Oil Pipe Lines argue that the figure FERC used
    30
    for 1992 costs is erroneous. (5) SFPP and the Association of Oil
    Pipe Lines argue that FERC made an arithmetic error in
    summing percentages of changes in rate elements to compute
    the total change in return. Petitioners failed, however, to raise
    any of those challenges in the proceedings before the
    Commission.
    A party must first raise an issue with an agency before
    seeking judicial review. United States v. L.A. Tucker Truck
    Lines, Inc., 
    344 U.S. 33
    , 36-37 (1952). This requirement serves
    at least two purposes. It ensures “simple fairness” to the agency
    and other affected litigants. It also provides this Court with a
    record to evaluate complex regulatory issues; after all, the scope
    of judicial review under the APA would be significantly
    expanded if courts were to adjudicate administrative action
    without the benefit of a full airing of the issues before the
    agency. See Advocates for Highway & Auto Safety v. Fed.
    Motor Carrier Safety Admin., 
    429 F.3d 1136
    , 1150 (D.C. Cir.
    2005).
    Petitioners believe that the absence of a rehearing
    requirement in the ICA means that they were not required to
    raise their complaints with FERC. Compare 49 U.S.C. app. §
    17(9)(h) (1988) (Interstate Commerce Act) with 15 U.S.C. §
    717r(b) (Natural Gas Act) and 16 U.S.C. § 825l(b) (Federal
    Power Act). Petitioners miss the point: Their error was not
    failing to seek rehearing, but rather failing to raise the issue at
    all. See Sims v. Apfel, 
    530 U.S. 103
    , 108-110 (2000); L.A.
    Tucker Truck Lines, Inc., 
    344 U.S. at 36-37
    ; Hormel v.
    Helvering, 
    312 U.S. 552
    , 556 (1941); Frontier Pipeline Co., 
    452 F.3d at 793
    ; cf. 
    47 U.S.C. § 405
    (a) (“The filing of a petition for
    reconsideration shall not be a condition precedent to judicial
    review of [an FCC decision] except where the party seeking
    such review . . . relies on questions of law or fact upon which
    the Commission . . . has been afforded no opportunity to pass.”).
    31
    We need not consider the merits of those arguments because
    none of them was raised below.
    D.
    In sum, we hold that FERC’s interpretation of § 1803 as
    requiring a substantial change in a pipeline’s cost of service is
    a reasonable interpretation of the statute. We need not address
    the petitioners’ challenges to FERC’s technical calculations
    because those arguments were not raised before the
    Commission.
    III. REPARATIONS
    Shipper petitioners also challenge the Commission’s denial
    of their claim for reparations for the service rates they have paid
    to use SFPP’s East Line since August 1, 2000. The ICA permits
    reparations for successful challenges to the justness and
    reasonableness of existing rates, see 49 U.S.C. app. § 16(3)
    (1988). If the Commission determines that the pipeline rates are
    not “just and reasonable,” shippers who file complaints – and
    only those shippers – are entitled to the difference between the
    rates they paid and the rates the Commission retrospectively
    determines to be just and reasonable. Id. The period for
    potential reparations generally includes two years prior to the
    filing date of the complaint. See id.; BP West Coast, 
    374 F.3d at 1305-06
    .
    In this case, the Commission determined that reparations
    were not warranted for the challenged rates that went into effect
    on August 1, 2000 because (1) they were proposed by SFPP in
    response to a FERC order, (2) FERC had accepted them (albeit
    on an interim basis), and (3) at the time the rates were accepted,
    FERC explicitly recognized shippers’ right to appropriate
    32
    refunds pending the Commission’s finalization of just and
    reasonable rates. Because reparations are precluded where the
    Commission has “approved or prescribed” a reasonable rate, see
    Arizona Grocery Co. v. Atchison, T. & S. F. Ry. Co., 
    284 U.S. 370
     (1932), FERC argued that shippers were not entitled to
    reparations for these rates. In challenging the Commission’s
    ruling, shippers argue, inter alia, that Arizona Grocery does not
    apply because the final rate has not been prescribed even as of
    the time briefs were filed and argument was made to this Court.
    The Commission and intervenors respond that this Court in BP
    West Coast affirmed an earlier Commission ruling that upon
    completion of refund calculations, the East Line’s rates are
    considered final and effective as of August 1, 2000; therefore,
    they argue, BP West Coast essentially permits Arizona Grocery
    protection of the final rate once it is determined.
    At the outset, we note that in this case the Commission
    accepted SFPP’s proposed rate subject to refund as an interim
    rate to compensate pipelines before the final just and reasonable
    rate was to be determined. The question before us is whether we
    should therefore consider the August 2000 rates minus potential
    refunds to be FERC-prescribed and thus immune to reparation
    claims. Critical to our analysis is the fact that when FERC
    accepted this interim rate, its methodology had not yet been
    established for determining the final rate. Because we agree
    with petitioners that the Commission could not have “approved
    or prescribed” just and reasonable rates as of August 1, 2000, we
    conclude that these yet-to-be-finalized rates, which the shippers
    paid to use SFPP’s East Line, do not receive Arizona Grocery
    protection. The Commission’s ruling in denying these shippers
    reparations was thus contrary to law.
    33
    A.
    To determine whether the challenged rates were FERC-
    prescribed, we must review their provenance. SFPP proposed
    the August 1, 2000 rates in response to a FERC order, which
    was the result of the proceedings now referred to as the OR92-8
    proceedings. We briefly describe the relevant portion of those
    proceedings.
    As we discussed in Part II, § 1803(a) of the EPAct
    grandfathered any rate in effect for the full year ending on the
    date of the enactment of the EPAct (October 24, 1992) unless it
    had been subject to protest, investigation, or complaint during
    that year. SFPP was unable to benefit from this protection for
    its East Line rates because one month before passage of the
    EPAct, a shipper filed a complaint challenging those rates. See
    BP West Coast, 
    374 F.3d at 1281
    . Following passage, numerous
    shippers filed complaints challenging the East Line rates that
    were not protected by the EPAct.
    The Commission grouped those complaints into two
    dockets: one docket included complaints filed between
    November 1992 and August 1995 (Docket No. OR92-8) and
    another docket included complaints filed between August 1995
    and August 2000 (Docket No. OR96-2). Although the petition
    before us challenges only FERC’s determination with respect to
    the complaints in the OR96-2 proceedings, because that
    determination rested in part on FERC’s action with respect to
    the complaints in the OR92-8 proceedings, we describe each
    docket in turn. The OR92-8 proceedings involved three steps by
    which FERC determined that “the East Line rates between Texas
    and Arizona were not just and reasonable and ordered them to
    be modified and directed SFPP to make reparations
    accordingly.” Opinion No. 435, 
    86 FERC ¶ 61,022
     at 61,055
    (1999) (citing SFPP, L.P., 
    80 FERC ¶ 63,014
     (1997)). Once the
    34
    initial determination of unreasonableness had been made, the
    Commission initiated proceedings to calculate the appropriate
    modification so that reparations could be paid to East Line
    shippers that had filed complaints. To calculate the appropriate
    modification, the Commission employed a “test-year”
    methodology. See 86 FERC at 61,113-14; see also BP West
    Coast, 
    374 F.3d at 1307
     (approving “test-year” methodology).
    The test year chosen for the OR92-8 proceedings was 1994.2
    The Commission took that rate and, using its indexing
    regulation,3 determined just and reasonable rates for the East
    Line from 1994 through August 1, 2000. See Opinion No. 435-
    B, 
    96 FERC ¶ 61,281
     at 62,071 (2001). The Commission then
    determined the amount of reparations due shippers that had
    challenged the East Line rates for these years by calculating the
    difference between the rates actually paid and the adjusted rates
    based on the test-year methodology. Finally, SFPP was ordered
    to pay these reparations to shippers who had filed complaints.4
    As indicated in Part I, the Commission’s order requiring
    SFPP to pay these reparations did not conclude the OR92-8
    proceedings. The shippers that had successfully challenged
    SFPP’s East Line rates also challenged the amount of
    2
    The ALJ had determined – and the Commission affirmed –
    that 1994 was a representative year “particularly for throughput.” 86
    FERC at 61,084-85.
    3
    The Commission’s indexing regulation permits pipelines to
    adjust their rates each year based on the Producer Price Index. See 
    18 C.F.R. § 342.3
    .
    4
    Although shippers are entitled to reparations beginning two
    years prior to the filing date of their complaints, it is not clear from the
    record whether the Commission indexed the 1994 rates to claims for
    prior years because the indexing regulations were not in effect prior to
    1995. See Opinion No. 435-B, 96 FERC at 62,071.
    35
    reparations calculated by FERC, arguing that its method of
    calculating SFPP’s cost of service for the test year was amiss.
    In litigation that came before us in BP West Coast, these
    shippers disputed whether SFPP ought to be allowed to recover
    (and thus remove from the amount of reparations owed) certain
    income tax allowances, litigation costs, and reconditioning costs.
    See 
    374 F.3d at 1285-1302
    . Because this Court vacated the
    Commission’s Lakehead policy and remanded for the
    Commission to re-calculate just and reasonable rates in light of
    that holding, 
    id. at 1312
    , FERC had not completed proper
    calculations when the instant case was heard.
    Meanwhile, the Commission had never made a final
    determination as to SFPP’s East Line rates going forward.
    Instead, the Commission directed SFPP to propose a new tariff
    for rates beginning on August 1, 2000. See Opinion No. 435-A,
    
    91 FERC ¶ 61,135
     at 61,521 (2000); Opinion No. 435-B, 96
    FERC at 62,075. SFPP proposed such a tariff (“Tariff No. 60”),
    which was based in large measure on the same calculations that
    FERC had used to determine just and reasonable rates for 1994
    through 2000. 96 FERC at 62,075.
    This proposed tariff faced substantial protest from shippers.
    The Commission also noted that there were “technical problems
    in SFPP’s compliance filings, some of which involved clear
    overreaching.” SFPP, L.P., 
    100 FERC ¶ 61,353
     at 62,626
    (2002). So the Commission accepted the rate on an interim
    basis subject to later refunds if the tariff was subsequently
    determined not to be just and reasonable.5 See 
    id. at 62,625
    .
    The Commission did so “out of equitable concern for the East
    5
    It is settled that the Commission had authority to direct a
    pipeline to file interim rates subject to refunds if there was a
    possibility that the final rates would be lower than the interim rates.
    See BP West Coast, 
    374 F.3d at 1305
    .
    36
    Line shippers that are not eligible for reparations in this
    proceeding” because they “would continue to pay rates higher
    than those that might ultimately be determined to be just and
    reasonable until such time as a final and definitive prospective
    rate was determined.” 
    Id.
     In other words, because FERC might
    later deem SFPP’s proposed August 2000 rates to be not just and
    reasonable, the Commission sought to give the benefit of that
    subsequent determination to East Line shippers who had not
    filed a complaint challenging these rates. The Commission
    therefore stressed that SFPP’s interim rate for the East Line
    shippers would not receive Arizona Grocery protection because
    in this case “the Commission has expressly reserved its authority
    in the context of an ongoing proceeding in which the
    methodology for determining the rate had not even been
    established.” Id. at 62,626 (emphasis added).
    Since submitting Tariff No. 60 in August 2000, SFPP has
    changed its rates each year pursuant to the Commission’s
    indexing regulations. See Respondent’s Br. at 48-49. That is,
    since August 1, 2000, all East Line shippers have been paying
    interim rates, and once the final rates are determined all East
    Line shippers will be entitled to refunds if the interim rates
    exceed the final rates. As of the time briefs in this matter were
    filed and argument was presented to this Court, SFPP and the
    Commission were still working out the implications of BP West
    Coast for the determination of a just and reasonable rate on the
    East Line. Whatever rate is eventually determined to be just and
    reasonable will be applied retroactively to August 1, 2000. See
    BP West Coast, 
    374 F.3d at 1304
    ; Opinion No. 435-B, 96 FERC
    at 62,079. The shippers seek review of FERC’s determination
    with respect to these rates.
    The post-August 1, 2000 rates at issue in this case were not
    directly challenged in the OR92-8 proceedings. Nevertheless,
    insofar as these rates applied to all East Line shippers, and
    37
    insofar as the complaints filed after August 1995 had still to be
    addressed, the post-August 1, 2000 rates had important
    consequences on the calculation of reparations arising from any
    rate proceedings that ended after August 1, 2000. This brings us
    to the OR96-2 proceedings, which involved complaints filed
    between late 1995 and August 2000.6 The OR96-2 proceedings
    were initially completed in March 2004, see Order on Initial
    Decision, 
    106 FERC ¶ 61,300
     (2004), then in June 2005, see
    Remand Order, 
    111 FERC ¶ 61,334
     (2005), and were revisited
    again in December 2005, see SFPP, L.P., 
    113 FERC ¶ 61,277
    (2005). This meant that the East Line’s post-August 1, 2000
    rates and the Commission’s refund policy came under scrutiny
    to the extent that reparations had to be calculated up until 2006
    for the OR96-2 complainants.
    In the OR96-2 proceedings, the Commission applied the
    same test-year methodology it had applied in the OR92-8
    proceedings, see 
    id.,
     but substituted 1999 for 1994 as the test
    year. See 113 FERC at 62,096-97. Accordingly, FERC first
    established the just and reasonable rates based on the estimated
    cost of service in 1999 and then indexed these rates forward to
    May 1, 2006. Based on FERC’s calculations of the test-year
    rate, SFPP was directed to make compliance filings with the
    proposed interim rates by February 15, 2006. 
    Id. at 62,115
    . The
    6
    Other than the time periods in which they were filed, there
    is no significant conceptual difference between the complaints in the
    OR92-8 proceedings and those in the OR96-2 proceedings. The
    complaints in the first docket challenged the East Line’s rates between
    November 1990 (two years before the first complaint in the docket
    was filed) and August 2000 (the date Tariff No. 60 went into effect).
    The complaints in the second docket challenged rates between late
    1993 (two years before the first complaint in the docket was filed) and
    May 2006 (the effective date of SFPP’s new tariff), see SFPP, L.P.,
    
    114 FERC ¶ 61,136
     at 61,463 (2006).
    38
    Commission held that SFPP’s newly proposed tariff would go
    into effect as of May 1, 2006. 
    Id.
     As in the OR92-8
    proceedings, the tariff was accepted on an interim basis and was
    subject to refund if the rates are later determined to be not just
    and reasonable. 
    Id.
     Reparations due shippers for rates paid
    between 1993 and August 1, 2000 – unless shippers have
    already received reparations based on the 1994 rates by virtue of
    having participated in the OR92-8 proceedings – will also be
    based on the 1999 indexed rates. 
    Id.
     Notably for the current
    controversy, however, the Commission does not intend to use
    the 1999 rates to determine the just and reasonable rates between
    August 1, 2000 and May 1, 2006.
    The Commission argues that as a result of the interim rate
    from SFPP’s Tariff No. 60, determined according to the OR92-8
    proceedings, all East Line shippers will already receive
    appropriate refunds once the initial 1994 test-year analysis is
    corrected and appropriate refunds are ordered. The Commission
    argues, therefore, that all shippers, including those in the OR96-
    2 proceedings, will eventually have paid just and reasonable
    rates on the East Line from August 1, 2000 because the refund
    will equal the amount between SFPP’s proposed interim rate and
    the final rate eventually calculated by the Commission.
    Respondent’s Br. at 39. For these reasons, in the orders under
    review, the Commission denied East Line shippers reparations
    for rates charged for East Line service since August 1, 2000.
    See ARCO Prods. Co., 
    92 FERC ¶ 61,244
     at 61,781 (2000);
    Order on Initial Decision, 106 FERC at 62,141; Remand Order,
    111 FERC at 62,462-63. Instead, shippers will be entitled to
    refunds alone. Shippers petition us to vacate FERC’s orders
    thereby entitling them to reparations. Before turning to our
    analysis of the shippers’ petition, we pause briefly to highlight
    the difference between refund and reparation.
    39
    When FERC has accepted interim rates subject to refund,
    all shippers – not just those that file complaints – are entitled to
    appropriate refunds once the final “just and reasonable” rates are
    established. Where the Commission has not prescribed final
    “just and reasonable” rates, refunds may be appropriate, e.g.,
    where an intervening change in law alters the Commission’s
    cost-of-service calculation. The BP West Coast case and the
    OR92-8 proceedings are illustrative. The Commission used a
    test-year methodology to calculate just and reasonable rates for
    a given period, but this Court subsequently held that the
    Commission, as a matter of law, erred in its income tax
    allowance policy. See 
    374 F.3d at 1285-93
    . This Court
    therefore remanded the case back to the Commission, and the
    Commission was required to recalculate the underlying rate in
    light of our holding. Upon completing the calculation, the
    Commission would then have to index the new just and
    reasonable rate forward, and order SFPP to refund any amount
    paid in excess of the new calculations. See, e.g., 113 FERC at
    62,115. Reparations, by contrast, correct the errors of rate
    calculations when those calculations have never been approved
    as just and reasonable, and only shippers that have filed
    complaints are entitled to reparations. But under Arizona
    Grocery, where the Commission has prescribed a reasonable
    rate, it may not then subject a carrier to reparations based on the
    Commission’s revised determination of reasonableness. See
    Arizona Grocery, 
    284 U.S. at 390
    .
    To those who do not specialize in the Commission’s
    proceedings, it may not be obvious why an East Line shipper
    that is already entitled to refunds at the completion of
    compliance proceedings would seek reparations, given that both
    refunds and reparations amend unreasonable rates by
    compensating those who have been subject to them by
    overpayment. The difference to petitioners between refund and
    reparation is simple: the two methods may, by circumstance
    40
    alone, reflect two different values.7
    B.
    The issue before us is whether Arizona Grocery precludes
    reparations otherwise due East Line shippers for the rates they
    have paid since August 1, 2000. We are asked to consider, in
    particular, our holding in BP West Coast, which acknowledged
    the Commission’s authority “to direct an oil pipeline to file
    interim rates to go into effect, subject to refund, during the
    suspension period for the initial rates.” 
    374 F.3d at 1305
    . The
    limited question before us is whether the final rate, which will
    be determined at the completion of compliance proceedings, is
    entitled to Arizona Grocery protection. Put differently, the
    question is whether East Line shippers can be considered to have
    paid FERC–prescribed rates since August 1, 2000 if they receive
    refunds at the end of yet-to-be concluded compliance
    7
    In a separate order, the Commission illustrates this
    possibility:
    By way of example only, assume that the new East Line rate
    established by this order would be $1.00 on January 1, 1994,
    and the indexed rate would be $1.10 on August 1, 2000 and
    $1.20 on May 1, 2006 (the target date of new interim rates in
    this proceeding). These levels ultimately become the January
    1, 1994 indexed final rates adopted by the Commission in this
    decision for the [OR92-8 Docket]. The projected final rate[s]
    developed from the 1999 cost of service in [the OR96-2
    Docket] are $1.05 as of August 1, 2000 and $1.15 as of May
    1, 2006. This latter and lower rate of $1.15 would be effective
    prospectively on May 1, 2006 because the East Line rates
    previously established in [the OR92-8 Docket] are subject to
    the Arizona Grocery doctrine.
    113 FERC at 62,110.
    41
    proceedings. If so, they will not be entitled to reparations. If the
    disputed rates paid since August 1, 2000 are not FERC-
    prescribed rates, shippers may seek reparations.
    The Arizona Grocery doctrine is essentially a prohibition
    against retroactive ratemaking. The key passage from Arizona
    Grocery states:
    Where the Commission has upon complaint, and after
    hearing, declared what is the maximum reasonable rate to
    be charged by a carrier, it may not at a later time . . . by
    declaring its own finding as to reasonableness erroneous,
    subject a carrier which conformed thereto to the payment of
    reparation measured by what the Commission now holds it
    should have decided in the earlier proceeding to be a
    reasonable rate.
    
    284 U.S. at 390
    ; see also Verizon Tel. Cos. v. FCC, 
    269 F.3d 1098
    , 1107 (D.C. Cir. 2001) (noting that Arizona Grocery
    proscribes “the retroactive revision of established rates through
    ex post reparations”). The purpose of the doctrine is to ensure
    that when carriers – in this case, pipelines – rely on the
    Commission’s determinations regarding just and reasonable
    rates, they will not then be forced to pay reparations when the
    Commission subsequently reconsiders its prior approval. See
    Arizona Grocery, 
    284 U.S. at 389
     (“[T]he carrier is entitled to
    rely upon the declaration as to what will be a lawful, that is, a
    reasonable rate[.]”). For this reason, in order for the Arizona
    Grocery doctrine to apply, the Commission must have
    “approved or prescribed” or “declared” a reasonable rate upon
    which the carrier has relied. 
    Id. at 381, 390
    .
    We hold that where, as here, the Commission accepts a
    pipeline’s proposed tariff subject to suspension and refund
    without even establishing the methodology for determining the
    42
    final rate, the Commission cannot properly be considered to
    have prescribed a just and reasonable rate until the proposed
    tariff is approved at the completion of compliance proceedings.
    Consequently, we hold that Arizona Grocery does not preclude
    reparations in this case. Our holding today is motivated in large
    measure by the Commission’s own acknowledgment that it was
    uncertain of the methodology it would use to determine a just
    and reasonable rate when it accepted Tariff No. 60. At the time
    the shippers moved their gas through the East Line, the
    Commission had yet to determine either a just and reasonable
    rate or even the methodology of calculating it. The rates the
    shippers paid were certainly not settled. The shippers, SFPP,
    and FERC all accepted the rates to be interim. More
    importantly, the shippers and SFPP knew that FERC had not yet
    established the methodology it would use to determine a just and
    reasonable rate for shipments after August 1, 2000. In such a
    context, the pipeline owner’s reliance interest – which Arizona
    Grocery tells us must be protected from retroactive ratemaking
    – simply does not exist. The fact that once FERC had
    determined how best to calculate a just and reasonable rate it
    would apply that methodology retroactively to Tariff No. 60
    does not help SFPP. That a rate is ultimately prescribed by
    FERC is a necessary but not sufficient condition to invoke
    Arizona Grocery protection. To extend Arizona Grocery
    protection to such unsettled rates retroactively would itself
    amount, potentially, to retroactive ratemaking. Therefore, even
    after having received refunds, all East Line shippers remain
    entitled to reparations to the extent that the Commission later
    determines these rates (less any refunds) to be unjust and
    unreasonable.
    Without any approval, prescription, or declaration of (at a
    minimum) a definitive methodology by which pipelines are
    instructed to compute reasonable rates, it is not at all clear in
    what sense the pipelines can be considered to have relied upon
    43
    the Commission’s determination. See Arizona Grocery, 
    284 U.S. at 390
     (noting that the Arizona Grocery doctrine only
    protects shippers that have “conformed” to FERC-prescribed
    rates). Perhaps a reliance argument could be made if the
    Commission had established a clear guideline for calculating
    reasonable rates and still accepted SFPP’s proposed rates on an
    interim basis merely because the calculation of the exact rate
    had not been completed. But that is not this case and we need
    not address whether this hypothetical would trigger Arizona
    Grocery protection. As the record here provides, “it is clear that
    the Commission had not reached a final determination on the
    methodology to be used to design SFPP’s East Line rates at the
    time it accepted Tariff No. 60 subject to refund or on the level
    of those rates.” 100 FERC at 62,625.
    At oral argument, the Commission argued that the Arizona
    Grocery doctrine was “all about whether people are on notice.”
    Tr. of Oral Arg. at 81. Thus, the Commission argued that where
    shipments move under rates the shippers know to be interim,
    these shipments can still be considered to have moved under the
    FERC-prescribed just and reasonable rates upon receiving
    appropriate refunds. This, we think, is an impermissibly broad
    reading of Arizona Grocery that vitiates its purpose, which is to
    protect the pipeline’s reasonable reliance interest. We are not
    aware of any authority that supports such a sweeping application
    of Arizona Grocery urged upon us by the Commission. By
    contrast, we have previously cautioned against overly broad
    interpretation of Arizona Grocery. See, e.g., Verizon Tel. Cos.,
    
    269 F.3d at 1107
     (“Arizona Grocery has been and should be
    understood in the terms in which it was decided . . . .”).
    In support of the Commission’s ruling, FERC and
    intervenors SFPP and the Association of Oil Pipe Lines argue
    that this Court in BP West Coast has already held that SFPP’s
    post-refund rates would be considered final and prescribed
    44
    effective August 1, 2000. But this asks too much of our holding
    in BP West Coast. In that case, SFPP challenged the
    Commission’s authority to order refunds to East Line shippers
    for the interim rates they had been paying since August 1, 2000.
    We held as regards pre-refund interim rates that “[t]he
    Commission did not establish final lawful rates where it has
    expressly reserved authority to make adjustments in the context
    of an ongoing proceeding in which the methodology for
    determining the rate had not even been established.” 
    374 F.3d at 1305
     (emphasis added). We never addressed whether the
    Commission’s final lawful rates would eventually be considered
    to have been prescribed as of August 1, 2000 for purposes of
    Arizona Grocery protection. The issue of whether shippers’
    claims for reparations would be barred by the Commission’s
    inability to establish the proper methodology to calculate just
    and reasonable rates until the end of compliance proceedings
    was not properly before us until today.
    Nor are we persuaded by intervenors’ argument that
    “[w]here, as here, FERC orders a carrier to make a compliance
    filing or file a new tariff to be effective prospectively from the
    date of the tariff, FERC is prescribing rates.” Final Joint Br. of
    Intervenors SFPP, L.P. and Ass’n of Oil Pipe Lines in Support
    of Respondent at 14. Such a broad statement is patently
    inconsistent with the holding of BP West Coast because in that
    case we specifically upheld the Commission’s authority to
    accept a tariff on an interim basis.
    In sum, the Commission acted contrary to law when it held
    that Arizona Grocery precluded the Commission from awarding
    reparations to East Line shippers for rates paid after August 1,
    2000. To be sure, for East Line shippers to receive reparations,
    they will still need to demonstrate that the rates they paid after
    August 1, 2000 were unjust and unreasonable. Nonetheless, the
    Commission erred by holding that Arizona Grocery
    45
    categorically barred it from granting the reparations sought by
    the shippers. For the foregoing reasons, we vacate the portions
    of the orders under review in which the Commission disallowed
    reparations for East Line rates post-August 1, 2000.
    IV.
    For the aforementioned reasons, the petitions for review are
    granted in part and denied in part. We deny the petitions for
    review with respect to the income tax allowance issues and the
    Energy Policy Act issues. We grant the petitions for review
    with respect to the reparations issue, and we remand to the
    Commission for further proceedings consistent with this
    opinion.
    So ordered.
    

Document Info

Docket Number: 04-1102

Filed Date: 5/29/2007

Precedential Status: Precedential

Modified Date: 12/21/2014

Authorities (21)

Association of Oil Pipe Lines v. Federal Energy Regulatory ... , 83 F.3d 1424 ( 1996 )

At&T Corp. v. Federal Communications Commission , 220 F.3d 607 ( 2000 )

Bp West Coast Products, LLC v. Federal Energy Regulatory ... , 374 F.3d 1263 ( 2004 )

City of Charlottesville, Virginia v. Federal Energy ... , 774 F.2d 1205 ( 1985 )

Verizon Telephone Companies v. Federal Communications ... , 269 F.3d 1098 ( 2001 )

Advoc Hwy Auto Sfty v. FMCSA , 429 F.3d 1136 ( 2005 )

Dominion Resources, Inc. v. Federal Energy Regulatory ... , 286 F.3d 586 ( 2002 )

Southern California Edison Co. v. Federal Energy Regulatory ... , 443 F.3d 94 ( 2006 )

Kennecott Greens Creek Mining Co. v. Mine Safety & Health ... , 476 F.3d 946 ( 2007 )

farmers-union-central-exchange-v-federal-energy-regulatory-commission-and , 584 F.2d 408 ( 1978 )

Exxon Corporation,petitioners v. Federal Energy Regulatory ... , 206 F.3d 47 ( 2000 )

Williston Basin Interstate Pipeline Co. v. Federal Energy ... , 165 F.3d 54 ( 1999 )

Frontier Pipeline Co. v. Federal Energy Regulatory ... , 452 F.3d 774 ( 2006 )

farmers-union-central-exchange-inc-v-federal-energy-regulatory , 734 F.2d 1486 ( 1984 )

Federal Power Commission v. Hope Natural Gas Co. , 64 S. Ct. 281 ( 1944 )

Arizona Grocery Co. v. Atchison, Topeka & Santa Fe Railway ... , 52 S. Ct. 183 ( 1932 )

Hormel v. Helvering , 61 S. Ct. 719 ( 1941 )

Motor Vehicle Mfrs. Assn. of United States, Inc. v. State ... , 103 S. Ct. 2856 ( 1983 )

United States v. Basye , 93 S. Ct. 1080 ( 1973 )

Securities & Exchange Commission v. Chenery Corp. , 332 U.S. 194 ( 1947 )

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