Starr International Company v. United States , 910 F.3d 527 ( 2018 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued September 13, 2018         Decided December 7, 2018
    No. 17-5238
    STARR INTERNATIONAL COMPANY, INC.,
    APPELLANT
    v.
    UNITED STATES OF AMERICA, ET AL.,
    APPELLEES
    Appeal from the United States District Court
    for the District of Columbia
    (No. 1:14-cv-01593)
    Rajiv Madan argued the cause for appellant. With him on
    the briefs were Christopher P. Bowers, Nathan P. Wacker, and
    Caroline Van Zile.
    Richard Caldarone, Attorney, U.S. Department of Justice,
    argued the cause for appellees. With him on the brief were
    Travis A. Greaves, Deputy Assistant Attorney General, and
    Gilbert S. Rothenberg and Richard Farber, Attorneys. Judith
    A. Hagley, Attorney, entered an appearance.
    Before: HENDERSON and MILLETT, Circuit Judges, and
    EDWARDS, Senior Circuit Judge.
    2
    Opinion for the Court filed by Senior Circuit Judge
    EDWARDS.
    EDWARDS, Senior Circuit Judge: Dividends paid by U.S.
    corporations and received by foreign shareholders are
    generally subject to a 30 percent withholding tax. See 26 U.S.C.
    §§ 881(a)(1), 1442(a). Bilateral tax treaties between the United
    States and other nations reduce this tax rate to encourage cross-
    border investments and allow taxpayers to avoid double
    taxation. This case concerns an attempt by Swiss-domiciled
    Starr International Company, Inc. (“Starr”) to avail itself of a
    bilateral tax treaty between the United States and Switzerland
    to reduce its tax rate on U.S.-source dividend income.
    See generally Convention Between the United States of
    America and the Swiss Confederation for the Avoidance of
    Double Taxation with Respect to Taxes on Income,
    Switz.-U.S., Oct. 2, 1996, S. Treaty Doc. No. 105-8 (1997)
    (“U.S.-Swiss Treaty” or “Treaty”).
    Starr is a privately held parent company to various
    international insurance and financial businesses. After
    establishing residence in Switzerland in 2006, Starr sought to
    pay a reduced tax rate under the U.S.-Swiss Treaty. Because
    Starr did not automatically qualify for treaty benefits, it relied
    on Article 22(6) of the Treaty, a provision that allows for
    discretionary tax relief. Article 22(6) states:
    A person that is not [otherwise] entitled to the benefits of
    this Convention . . . may, nevertheless, be granted the
    benefits of the Convention if the competent authority of
    the State in which the income arises so determines after
    consultation with the competent authority of the other
    Contracting State.
    3
    U.S.-Swiss Treaty art. 22(6). A Swiss taxpayer will be denied
    relief under Article 22(6) if the U.S. Competent Authority
    determines that obtaining benefits under the Treaty was one
    of the taxpayer’s “principal purposes” in establishing itself
    in Switzerland. Dep’t of the Treasury, Technical Explanation
    of the Convention Between the United States of America and
    the Swiss Confederation for the Avoidance of Double
    Taxation with Respect to Taxes on Income (“Technical
    Explanation”) 72.
    Starr sought discretionary relief from the U.S. Competent
    Authority – the Internal Revenue Service (“IRS”) Deputy
    Commissioner for the Large Business and International
    Division – for the 2007 tax year. The IRS denied Starr’s request
    after concluding that obtaining treaty benefits was a principal
    purpose of Starr’s move to Switzerland. Objecting to this
    determination, Starr filed a claim for a refund of approximately
    $38 million in taxes improperly withheld. Starr then brought
    suit for a tax refund in the District Court, alleging that the IRS
    erred in denying Starr benefits under the U.S.-Swiss Treaty.
    The District Court dismissed Starr’s tax refund claim on the
    ground that it raised a nonjusticiable political question. See
    Starr Int’l Co., Inc. v. United States (“Starr II”), No. 14-cv-
    01593 (CRC), 
    2016 WL 410989
    , at *2 (D.D.C. Feb. 2, 2016).
    Starr then amended its complaint to bring a claim under the
    Administrative Procedure Act (“APA”), challenging the IRS’s
    denial of treaty benefits as arbitrary and capricious. The
    District Court granted the Government’s motion for summary
    judgment on Starr’s APA claim. Starr Int’l Co., Inc. v. United
    States (“Starr III”), 
    275 F. Supp. 3d 228
    , 251 (D.D.C. 2017). It
    held that the IRS had reasonably interpreted and applied the
    U.S.-Swiss Treaty in denying Starr’s request. 
    Id. 4 Starr
    now appeals both decisions of the District Court. It
    claims the IRS misinterpreted and misapplied Article 22(6) and
    the Technical Explanation’s “principal purpose” test. Starr
    therefore asks this court to issue a judgment granting the
    requested tax refund, which it maintains does not raise a
    political question.
    For the reasons stated below, we reverse the decision of the
    District Court dismissing Starr’s tax refund claim as raising a
    nonjusticiable political question and remand for further
    proceedings. Because we hold that Starr can proceed with its
    tax refund claim, we also hold that Starr does not have a cause
    of action under the APA. We therefore vacate the District
    Court’s decision granting summary judgment against Starr on
    its APA claim, and remand with instructions to dismiss that
    claim.
    I.   BACKGROUND
    A. The U.S.-Swiss Treaty
    Section 881(a) of the Internal Revenue Code imposes a
    30 percent tax on the U.S.-source income, such as dividend
    income, of foreign corporations. 26 U.S.C. § 881(a)(1). To
    collect this tax, the IRS requires U.S. corporations issuing
    dividends to withhold the tax from the foreign taxpayers and
    remit it directly to the IRS. See 26 U.S.C. § 1442(a). Dividend
    income may be subject to a lower tax rate if the taxpayer is a
    resident of a country with which the United States has an
    income tax treaty. As relevant here, the U.S.-Swiss Treaty
    reduces the tax on U.S.-source dividend income for Swiss
    residents from 30 percent to either 5 or 15 percent, depending
    5
    on the Swiss entity’s percentage of ownership in the U.S.
    corporation. See U.S.-Swiss Treaty art. 10.
    By reducing tax rates, bilateral tax agreements like the
    U.S.-Swiss Treaty serve several purposes, including removing
    impediments to trade and cross-border investment. See Tax
    Convention with Switzerland, S. Exec. Rep. No. 105-10, at 1
    (1997). They mitigate double taxation of income earned by
    residents of one country from sources within the other country,
    in addition to preventing tax evasion by facilitating information
    sharing between the tax authorities of the treaty countries.
    See 
    id. at 1–2.
    Treaty “Limitation on Benefits” provisions
    establish the criteria taxpayers must meet in order to obtain
    benefits. These provisions are designed to filter out “treaty
    shoppers,” or residents of third states who use legal entities
    established in a contracting state in order to obtain the benefits
    of a tax treaty. Technical Explanation 59.
    Article 22 is the “Limitation on Benefits” section of the
    U.S.-Swiss Treaty. It begins with a series of objective,
    mechanical tests designed to identify those treaty-country
    residents who merit benefits because of legitimate, non-tax
    motives for their claimed state of residency. See U.S.-Swiss
    Treaty art. 22(1)–(3); see also Technical Explanation 59. For
    example, individuals residing in Switzerland, certain Swiss
    family foundations, and companies engaged in business in
    Switzerland that meet specified criteria are automatically
    eligible for benefits. U.S.-Swiss Treaty art. 22(1)(a), (c), (g).
    The “assumption” underlying these tests is that a taxpayer
    who satisfies them “probably has a real business purpose for
    the structure it has adopted, or has a sufficiently strong nexus
    to the other Contracting State” to warrant benefits, and such
    “business purpose or connection outweighs any purpose
    to obtain the benefits of the Convention.” Technical
    Explanation 59.
    6
    The Treaty drafters recognized that certain entities with
    legitimate reasons for residing in a contracting state might fail
    the rigid mechanical tests of Article 22, which “cannot account
    for every case in which the taxpayer was not treaty shopping.”
    Technical Explanation 60. Accordingly, paragraph 6 of
    Article 22 leaves open the possibility of discretionary relief for
    persons who are not otherwise entitled to benefits “if the
    competent authority of the State in which the income arises so
    determines after consultation with the competent authority of
    the other Contracting State.” U.S.-Swiss Treaty art. 22(6).
    Paragraph 6, like the mechanical tests, aims “to identify
    investors whose residence in the other State can be explained
    by factors other than a purpose to derive treaty benefits.”
    Technical Explanation 60. Therefore, in deciding whether a
    taxpayer qualifies for relief under Article 22(6), the competent
    authority of the treaty country in which the taxpayer’s income
    arises
    will base a determination under this paragraph on
    whether the establishment, acquisition, or maintenance
    of the person seeking benefits under the Convention,
    or the conduct of such person’s operations, has or had
    as one of its principal purposes the obtaining of
    benefits under the Convention. Thus, persons that
    establish operations in one of the States with a
    principal purpose of obtaining the benefits of the
    Convention ordinarily will not be granted relief under
    paragraph 6.
    
    Id. at 72.
    This “principal purpose” test provides the standard
    for evaluating whether a taxpayer is entitled to relief under
    Article 22(6).
    7
    B. Factual and Procedural Background
    Starr, a parent company to a number of international
    financial and insurance businesses, was once the largest
    shareholder of American International Group, Inc. (“AIG”).
    Starr continued to hold significant investments in AIG common
    stock, its principal asset, at all times relevant to this case. In
    2004, Starr relocated to Ireland from Bermuda, where it had
    long resided. In Ireland, Starr paid a reduced rate of
    withholding tax on dividends under a bilateral income tax
    treaty between the United States and Ireland. In 2006, Starr
    established itself in Switzerland and subsequently sought to
    reduce its dividend tax rate by obtaining benefits under the
    U.S.-Swiss Treaty. Because Starr did not automatically qualify
    for benefits under the mechanical tests of Article 22, it
    requested discretionary relief under paragraph 6.
    After a prolonged review process from 2007 to 2010, the
    U.S. Competent Authority issued a final determination letter
    denying Starr’s request. The Competent Authority found it
    “impossible . . . to conclude that obtaining treaty benefits was
    not at least one of the principal purposes for moving [Starr’s]
    management, and therefore its residency, to Switzerland.” Joint
    Appendix (“J.A.”) 256. The letter pointed to “facts and
    circumstances regarding [Starr’s] original structure and
    subsequent restructurings” that the Competent Authority found
    “troubling,” including Starr’s (1) legal organization and initial
    incorporation in Panama, (2) relocation to Ireland and
    enjoyment of tax treaty benefits shortly before the payment of
    AIG dividends, (3) brief residence in Ireland before moving to
    Switzerland, and (4) control by predominately U.S.
    individuals. J.A. 255–56.
    Starr filed a claim for a tax refund with the IRS for the 2007
    tax year, seeking approximately $38 million based on the
    8
    Treaty’s reduced tax rates. When the IRS took no action on
    Starr’s refund claim, Starr brought a tax refund suit in the
    District Court under § 7422(a) of the Internal Revenue Code to
    recover the taxes it alleges were wrongly withheld. Complaint
    ¶¶ 3, 53–56, J.A. 312, 322; see also 26 U.S.C. § 7422(a)
    (providing a cause of action for a “suit or proceeding . . . for
    the recovery of [an] internal revenue tax alleged to have been
    erroneously or illegally assessed or collected”). Starr asserts
    that the Government erred in denying benefits under the U.S.-
    Swiss Treaty because it was not treaty shopping when it
    relocated to Switzerland, and because the U.S. Competent
    Authority failed to consult with its Swiss counterpart before
    denying Starr’s request. Complaint ¶¶ 49–50, J.A. 320–21.
    The District Court initially granted the Government’s
    motion to dismiss Starr’s claim that the Government violated
    the Treaty by failing to consult with the Swiss Competent
    Authority, but allowed Starr’s tax refund claim to proceed.
    Starr Int’l Co., Inc. v. United States (“Starr I”), 
    139 F. Supp. 3d
    214, 231 (D.D.C. 2015), vacated, Starr II, 
    2016 WL 410989
    . The court found that the U.S.-Swiss Treaty and
    guidance from the Technical Explanation, including the
    “principal purpose” test, provide a judicially-manageable
    standard for review of whether Starr is entitled to relief under
    Article 22(6). 
    Id. at 229.
    It granted Starr’s motion to strike the
    Government’s justiciability defenses, finding that the
    Government’s decision was not committed to agency
    discretion by law, 
    id. at 228,
    and that interpreting the terms of
    the Treaty would not implicate the political question doctrine,
    
    id. at 231.
    The District Court subsequently vacated its decision in
    Starr I after the Government moved for reconsideration.
    Starr II, 
    2016 WL 410989
    , at *6. The court reaffirmed its prior
    holding that a manageable standard exists for assessing
    9
    whether Starr met the relevant criteria for obtaining treaty
    benefits. 
    Id. at *1.
    It also reiterated that interpreting the Treaty
    “in a manner necessary to determine whether Starr met the
    applicable criteria would not offend the political-question
    doctrine.” 
    Id. However, the
    court dismissed Starr’s tax refund
    claim under 26 U.S.C. § 7422(a) as raising a nonjusticiable
    political question. 
    Id. at *2.
    As the District Court saw it,
    ordering the IRS to pay Starr the requested $38 million refund
    would impinge upon the Executive Branch’s exercise of
    diplomacy in its consultation with the Swiss competent
    authority, as required under Article 22(6). 
    Id. As consultation
    had not yet occurred, the court believed that, if it were to find
    that Starr was entitled to treaty benefits, ordering the IRS to
    issue Starr a specific monetary refund would “render
    consultation meaningless or dictate its outcome.” 
    Id. Because the
    District Court assumed it could not redress Starr’s harm
    without answering a political question, it held that Starr lacked
    standing to pursue its tax refund claim. 
    Id. at *4.
    The court thus
    allowed Starr to amend its complaint to bring a claim under the
    APA. 
    Id. at *6.
    Starr then challenged the Government’s denial of treaty
    benefits as “arbitrary, capricious, an abuse of discretion, and
    otherwise not in accordance with law.” First Amended
    Complaint ¶ 3, J.A. 347; see also 5 U.S.C. § 706(2)(A). In a
    lengthy opinion, the District Court granted the Government’s
    motion for summary judgment and denied Starr’s cross-
    motion. Starr 
    III, 275 F. Supp. 3d at 251
    . The court held that
    the Government reasonably interpreted and applied the U.S.-
    Swiss Treaty and the Technical Explanation in denying Starr a
    tax refund. See 
    id. Starr appeals
    both the decision in Starr II granting the
    Government’s motion to dismiss the tax refund claim as a
    nonjusticiable political question, as well as the decision in
    10
    Starr III granting the Government’s motion for summary
    judgment and denying Starr’s cross-motion on the APA claim.
    II. ANALYSIS
    A. Standard of Review
    We review de novo whether this case presents a
    nonjusticiable political question. See Ralls Corp. v. Comm. on
    Foreign Inv. in U.S., 
    758 F.3d 296
    , 314 (D.C. Cir. 2014). In
    light of our decision, as explained below, that Starr does not
    have a cause of action under the APA, see 5 U.S.C. § 704, we
    decline to review the District Court’s decision on Starr’s APA
    claim.
    B. The Political Question Doctrine Has No Application
    in this Case
    The District Court dismissed Starr’s tax refund claim under
    26 U.S.C. § 7422(a) as raising a nonjusticiable political
    question. We hold that the District Court erred regarding the
    applicability of the political question doctrine.
    The Supreme Court laid out its oft-cited formulation of the
    political question doctrine in Baker v. Carr:
    Prominent on the surface of any case held to involve a
    political question is found a textually demonstrable
    constitutional commitment of the issue to a coordinate
    political department; or a lack of judicially
    discoverable and manageable standards for resolving
    it; or the impossibility of deciding without an initial
    policy determination of a kind clearly for nonjudicial
    discretion; or the impossibility of a court’s undertaking
    independent resolution without expressing lack of the
    11
    respect due coordinate branches of government; or an
    unusual need for unquestioning adherence to a political
    decision already made; or the potentiality of
    embarrassment from multifarious pronouncements by
    various departments on one question.
    
    369 U.S. 186
    , 217 (1962). Under Baker v. Carr and its progeny,
    a court may not dismiss a claim as nonjusticiable “[u]nless one
    of these formulations is inextricable from the case at bar.”
    bin Ali Jaber v. United States, 
    861 F.3d 241
    , 245 (D.C. Cir.
    2017) (quoting Baker v. 
    Carr, 369 U.S. at 217
    ).
    Furthermore, the Supreme Court has made it clear that
    application of the political question doctrine is a limited and
    narrow exception to federal court jurisdiction. For example, in
    United States v. Munoz-Flores, 
    495 U.S. 385
    (1990), the
    Supreme Court considered whether a special assessment statute
    was a revenue raising bill within the meaning of the Origination
    Clause. 
    Id. at 387.
    In rejecting the Government’s argument that
    the case presented a nonjusticiable political question, the Court
    aptly noted:
    Surely a judicial system capable of determining when
    punishment is “cruel and unusual,” when bail is
    “[e]xcessive,” when searches are “unreasonable,” and
    when congressional action is “necessary and proper”
    for executing an enumerated power is capable of
    making the more prosaic judgments demanded by
    adjudication of Origination Clause challenges.
    
    Id. at 396.
    Thus, “it is error to suppose that every case or controversy
    which touches foreign relations lies beyond judicial
    cognizance,” Baker v. 
    Carr, 369 U.S. at 211
    , and it is axiomatic
    12
    that “courts have the authority to construe treaties,” Japan
    Whaling Ass’n v. Am. Cetacean Soc’y, 
    478 U.S. 221
    , 230
    (1986). A court cannot “avoid [its] responsibility” to enforce a
    specific statutory right “merely ‘because the issues have
    political implications.’” Zivotofsky ex rel. Zivotofsky v. Clinton,
    
    566 U.S. 189
    , 196 (2012) (quoting INS v. Chadha, 
    462 U.S. 919
    , 943 (1983)).
    None of the Baker v. Carr factors are present in Starr’s tax
    refund claim. Starr’s eligibility for discretionary relief under
    Article 22(6) presents a straightforward case of treaty
    interpretation. And Article 22(6) and the Technical
    Explanation provide meaningful standards that enable a court
    to determine whether the IRS’s determination was erroneous.
    Therefore, Starr’s claim that the IRS misinterpreted federal law
    in denying the company a refund is plainly a matter for a court
    to decide.
    The Supreme Court’s decisions in Japan Whaling and
    Zivotofsky are particularly instructive. In Japan Whaling, the
    Court rejected the argument that the political question doctrine
    barred judicial resolution of an action to repudiate an executive
    agreement between the United States and Japan and to require
    the U.S. Secretary of Commerce to certify Japan as violating
    an international convention. Japan 
    Whaling, 478 U.S. at 229
    –
    30. The challenge to the Secretary’s decision not to certify
    Japan for harvesting whales in excess of international quotas
    “present[ed] a purely legal question of statutory interpretation.”
    
    Id. at 230.
    The Court had to “determine the nature and scope of
    the duty imposed upon the Secretary by the [statute], a decision
    which call[ed] for applying no more than the traditional rules
    of statutory construction, and then applying this analysis to the
    particular set of facts presented.” 
    Id. Cognizant of
    the
    decision’s potential implications for foreign relations and the
    “premier role which both Congress and the Executive play in
    13
    [that] field,” the Court nonetheless concluded that “under the
    Constitution, one of the Judiciary’s characteristic roles is to
    interpret statutes, and we cannot shirk this responsibility
    merely because our decision may have significant political
    overtones.” 
    Id. The decision
    in Zivotofsky is the Supreme Court’s most
    recent reminder that the judiciary must resolve disputes over
    specific statutory rights when properly called upon to do so.
    Zivotofsky concerned a statute that directed the Secretary of
    State, upon request, to issue to a U.S. citizen born in Jerusalem
    a birth certificate or passport identifying Israel as the place of
    
    birth. 566 U.S. at 191
    –92. Diplomatic officials later refused a
    request to list “Jerusalem, Israel,” as an individual’s place of
    birth out of concern that the statute would impermissibly
    interfere with the Executive’s foreign relations powers. 
    Id. at 192–93.
    The Court held that the question of the statute’s
    constitutionality was justiciable. 
    Id. at 194,
    201. The Court was
    not being asked to determine whether Jerusalem is the capital
    of Israel but instead to decide whether an individual had a
    statutory right to have Israel designated as his place of birth on
    his passport. 
    Id. at 195.
    “[Zivotofsky] recognizes that, in foreign
    policy cases, courts must first ascertain if ‘[t]he federal courts
    are . . . being asked to supplant a foreign policy decision of the
    political branches with the courts’ own unmoored
    determination’ or, instead, merely tasked with, for instance, the
    ‘familiar judicial exercise’ of determining how a statute should
    be interpreted or whether it is constitutional.” bin Ali 
    Jaber, 861 F.3d at 248
    (quoting 
    Zivotofsky, 566 U.S. at 196
    ).
    Starr’s tax refund claim is squarely an example of the latter
    case. Starr’s claim requires a court to “determine the nature and
    scope of the duty imposed” on the U.S. Competent Authority
    under Article 22(6), “a decision which calls for applying no
    more than the traditional rules of statutory construction” with
    14
    respect to the U.S.-Swiss Treaty, “and then applying this
    analysis to the particular set of facts” of Starr’s case. Japan
    
    Whaling, 478 U.S. at 230
    ; see also Hourani v. Mirtchev, 
    796 F.3d 1
    , 8 (D.C. Cir. 2015) (declining to find a case
    nonjusticiable under the political question doctrine where “the
    standards needed to resolve” the claims at issue were “the
    workaday tools for decision-making that courts routinely
    employ,” even though the court’s judgment “might implicate
    the actions of a foreign government”). And it is hardly an
    oddity for courts to adjudicate tax claims based on international
    tax agreements, which is all that is required here. See, e.g.,
    Eshel v. Comm’r, 
    831 F.3d 512
    (D.C. Cir. 2016); Nat’l
    Westminster Bank, PLC v. United States, 
    512 F.3d 1347
    (Fed.
    Cir. 2008); Del Commercial Props., Inc. v. Comm’r, 
    251 F.3d 210
    (D.C. Cir. 2001); Xerox Corp. v. United States, 
    41 F.3d 647
    (Fed. Cir. 1994).
    The District Court held that Starr’s refund action was
    nonjusticiable because granting a refund would “impinge upon
    the Executive’s prerogative to engage in [the consultation]
    process” with Switzerland. Starr II, 
    2016 WL 410989
    , at *2.
    Explaining that it could not “dictate the contents of any
    diplomatic communications in which the executive branch
    engages,” the court assumed that a decision about Starr’s
    eligibility for relief under Article 22(6) would impermissibly
    “establish the outcome of any negotiation or consultation
    between an executive-branch official and representatives of a
    foreign country.” 
    Id. at *4.
    The court focused on its perceived
    “inability and lack of competence” to “step into the shoes of
    the IRS and its Swiss counterparts and effectively preordain the
    outcome of any consultation between the two.” 
    Id. at **3–4.
    This understanding of Starr’s tax refund claim and the political
    question doctrine was incorrect.
    15
    A District Court decision will have no impact on the
    consultation between the U.S. and Swiss Competent
    Authorities. Starr asks for a judicial determination as to
    whether the Government erred in denying Starr treaty benefits.
    As explained below, if the District Court finds the IRS’s
    position indefensible, it can stay the case pending consultation
    between the Competent Authorities, as consultation is required
    before a refund can be granted. See U.S.-Swiss Treaty art.
    22(6). The IRS then can return to court and present any new
    evidence from consultation. Our holding does not grant Starr
    the right to review the consultation. Rather, consultation is
    merely one element of the IRS’s deliberative process. The
    Government may use information that arises out of
    consultation as support for its ultimate decision, but Starr duly
    concedes that it has no right to challenge the consultation itself.
    And a foreign authority’s views do not control any
    determination by the U.S. Competent Authority under
    Article 22(6). See Oral Argument at 39:14–39:35, 45:13–
    45:35, No. 17-5238 (D.C. Cir. argued Sept. 13, 2018).
    Because the District Court concluded that it could not
    redress Starr’s harm without deciding a political question, it
    found that Starr lacked standing. Starr II, 
    2016 WL 410989
    ,
    at *4. However, the question as to whether the IRS properly
    found Starr ineligible for treaty benefits under Article 22(6)
    does not raise a political question. Therefore, Starr’s standing
    is not in dispute because a tax refund of the requested $38
    million would plainly redress Starr’s injury. We therefore
    reverse and remand the District Court’s judgment so that Starr
    may proceed with its tax refund claim under 26 U.S.C.
    § 7422(a).
    16
    C. Starr Does Not Have a Cause of Action Under
    the APA
    Because the District Court assumed that Starr could not
    seek redress under 26 U.S.C. § 7422(a), it allowed Starr to
    challenge the Government’s denial of treaty benefits under the
    APA, although it found no merit in that claim. We hold that the
    District Court was mistaken in assuming that Starr could
    pursue a cause of action under the APA.
    The APA supports a cause of action only when “there is no
    other adequate remedy in a court.” 5 U.S.C. § 704. Because
    26 U.S.C. § 7422(a) is the appropriate vehicle for Starr’s claim
    for relief, Starr does not have a cause of action under the APA.
    See Perry Capital LLC v. Mnuchin, 
    864 F.3d 591
    , 620–21
    (D.C. Cir. 2017) (explaining that the adequate remedy bar of
    § 704 determines whether there is a cause of action under the
    APA); Cohen v. United States, 
    650 F.3d 717
    , 731 (D.C. Cir.
    2011) (en banc) (holding that APA review of a challenge to tax
    refund procedures would be available only if 26 U.S.C. §
    7422(a) did not provide an adequate remedy).
    D. Starr’s Tax Refund Claim was Properly Brought
    Under 26 U.S.C. § 7422(a)
    Section 7422(a) of the Internal Revenue Code provides a
    cause of action for the “recovery” of a “tax alleged to have been
    erroneously or illegally assessed or collected,” 26 U.S.C.
    § 7422(a), which is precisely the relief Starr seeks. Taxpayers
    are generally required to challenge the validity of a tax
    assessment in a refund proceeding, as opposed to suits seeking
    equitable or declaratory relief. See, e.g., Bob Jones Univ. v.
    Simon, 
    416 U.S. 725
    , 746 (1974) (holding that suits for refunds
    offer taxpayers a full opportunity to litigate the legality of IRS
    17
    decisions); Enochs v. Williams Packing & Nav. Co., 
    370 U.S. 1
    , 7 (1962) (interpreting the Anti-Injunction Act, 26 U.S.C.
    § 7421(a), to “require that the legal right to . . . disputed sums
    be determined in a suit for refund”); Fla. Bankers Ass’n v. U.S.
    Dep’t of Treasury, 
    799 F.3d 1065
    , 1066 (D.C. Cir. 2015)
    (affirming that challenges to tax statutes and regulations are to
    be brought in refund suits after a tax has been paid or in
    deficiency proceedings).
    The Government cites Cohen, 
    650 F.3d 717
    , in support of
    its claim that Starr’s case should be decided under the APA.
    We disagree. In Cohen, we stated unequivocally that “taxpayer
    challenges to the validity of an individual tax” are
    “paradigmatic refund 
    suits.” 650 F.3d at 733
    . And we stressed
    the fundamental difference between those cases and
    “challenge[s] to an IRS regulation, action, or procedure
    unrelated to the individual assessment or collection of taxes.”
    
    Id. Cohen involved
    a class-action challenge to a refund
    mechanism that the IRS had established after illegally
    collecting an excise tax on phone calls. 
    Id. at 720–21.
    We
    allowed the APA action to proceed because, “[i]n the tax
    context, the only APA suits subject to review would be those
    cases pertaining to final agency action unrelated to tax
    assessment and collection.” 
    Id. at 733.
    The plaintiffs in Cohen
    sought prospective, non-monetary relief, so an APA action was
    appropriate.
    Unlike in Cohen, Starr challenges the validity of an
    individual tax, not IRS procedures, and requests retroactive
    monetary relief. We therefore remand the case to the District
    Court to allow Starr to pursue its claim for a tax refund. One of
    four possible scenarios will likely play out, though the parties
    and the District Court may consider other ways to proceed:
    18
    1. The U.S. Competent Authority could decide to proceed
    with consultation and might subsequently determine that Starr
    is entitled to benefits under the U.S.-Swiss Treaty. If the IRS
    awards Starr the monetary amount it seeks, the case will
    presumably be moot.
    2. The U.S. Competent Authority might consult with its
    Swiss counterpart and maintain its current position that Starr is
    not entitled to Treaty benefits. Engaging in consultation before
    further proceedings in the District Court could expedite
    resolution of this case and give the Government any additional
    information that might come from consultation. If the District
    Court finds that the IRS should have deemed Starr eligible for
    benefits under Article 22(6), then the court may award Starr the
    money it seeks, consultation having already occurred as
    required under the Treaty.
    3. The IRS might choose to maintain its current position
    without engaging in consultation at this time. If the District
    Court finds the IRS’s position indefensible, it can stay the case
    pending consultation between the U.S. and Swiss Competent
    Authorities, as no refund can be granted without consultation.
    The IRS can return to court and have the opportunity to present
    any new evidence that may have come to light during
    consultation. This posture would not afford Starr the right to
    seek review of the consultation, which is simply part of the
    IRS’s deliberative process. But if the IRS returns to the District
    Court and cites information obtained during the consultation
    process as the reason for denying tax benefits, that decision
    would be reviewable.
    4. If the refund action goes forward and the District Court
    finds the evidence supports the IRS’s decision to deny benefits,
    then judgment may be granted in the Government’s favor.
    19
    In the last three scenarios above, appellate review may be
    sought by an aggrieved party, as appropriate. In reviewing any
    IRS decision to deny Starr benefits under the U.S.-Swiss
    Treaty, the District Court will use established principles of
    treaty interpretation in evaluating the IRS’s application of
    Article 22(6). “The interpretation of a treaty . . . begins with its
    text.” Medellin v. Texas, 
    552 U.S. 491
    , 506 (2008). The “clear
    import” of a treaty’s text “controls unless application of the
    words of the treaty according to their obvious meaning effects
    a result inconsistent with the intent or expectations of its
    signatories.” Sumitomo Shoji Am., Inc. v. Avagliano, 
    457 U.S. 176
    , 180 (1982) (citation and internal quotation marks
    omitted). If a treaty’s text leaves any ambiguity, a court should
    “consult[] sources illuminating the ‘shared expectations of the
    contracting parties,’ such as ‘the negotiating and drafting
    history’ and ‘the postratification understanding of the
    contracting parties.’” 
    Eshel, 831 F.3d at 519
    –20 (quoting
    Zicherman v. Korean Air Lines Co., 
    516 U.S. 217
    , 223, 226
    (1996)). “Although not conclusive, the meaning attributed to
    treaty provisions by the Government agencies charged with
    their negotiation and enforcement is entitled to great weight.”
    
    Sumitomo, 457 U.S. at 184
    –85.
    Finally, Starr urges this court to hold that the IRS
    misinterpreted and misapplied Article 22(6) and the principal
    purpose test of the Technical Explanation. We recognize that
    the District Court addressed these issues when it reviewed the
    IRS’s determination in the context of Starr’s APA claim.
    However, because we remand this case to the District Court to
    proceed as a tax refund claim, we leave it to the District Court
    in the first instance to consider Starr’s arguments in the context
    of the tax refund action.
    20
    III. CONCLUSION
    For the foregoing reasons, we reverse the decision of the
    District Court dismissing Starr’s tax refund claim and remand
    for further proceedings. We vacate the District Court’s decision
    granting the Government’s motion for summary judgment and
    denying Starr’s cross-motion with respect to Starr’s APA
    claim, and we remand with instructions to dismiss that claim.
    So ordered.