AT&T Corp. v. FCC ( 2020 )


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    United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued May 4, 2020                   Decided August 4, 2020
    No. 18-1007
    AT&T CORP.,
    PETITIONER
    v.
    FEDERAL COMMUNICATIONS COMMISSION AND UNITED
    STATES OF AMERICA,
    RESPONDENTS
    IOWA NETWORK SERVICES, INC., ET AL.,
    INTERVENORS
    Consolidated with 18-1257, 19-1013
    On Petitions for Review of Orders of the
    Federal Communications Commission
    James U. Troup argued the cause for petitioner Iowa
    Network Services, Inc. d/b/a Aureon Network Services. With
    him on the briefs was Tony S. Lee.
    Benjamin H. Dickens Jr., Mary J. Sisak, and Salvatore
    Taillefer Jr. were on the briefs for intervenor South Dakota
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    2
    Network, LLC in support of petitioner Iowa Network Services,
    Inc. d/b/a Aureon Network Services.
    Joseph R. Guerra argued the cause for petitioner AT&T
    Corp. With him on the briefs were Michael J. Hunseder,
    Spencer D. Driscoll, Gary L. Phillips, and David L. Lawson.
    Timothy J. Simeone was on the briefs for intervenor Sprint
    Communications Company L.P. in support of petitioner AT&T
    Corp. Christopher J. Wright entered an appearance.
    William J. Scher, Counsel, Federal Communications
    Commission, argued the cause for respondents. With him on
    the brief were Michael F. Murray, Deputy Assistant Attorney
    General, U.S. Department of Justice, Robert B. Nicholson and
    Mary Helen Wimberly, Attorneys, Thomas M. Johnson, Jr.,
    General Counsel, Federal Communications Commission,
    Ashley S. Boizelle, Deputy General Counsel, and Richard K.
    Welch, Deputy Associate General Counsel. Jacob M. Lewis,
    Associate General Counsel, entered an appearance.
    Joseph R. Guerra, Michael J. Hunseder, Spencer D.
    Driscoll, Gary L. Phillips, David L. Lawson, and Timothy J.
    Simeone were on the brief for intervenors AT&T Corp. and
    Sprint Communications Company, L.P. in support of
    respondents. Christopher J. Wright entered an appearance.
    James U. Troup and Tony S. Lee were on the brief for
    intervenor Iowa Network Services, Inc. d/b/a Aureon Network
    Services in support of respondents.
    Before: TATEL, GRIFFITH, and KATSAS, Circuit Judges.
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    3
    Opinion for the Court filed PER CURIAM.*
    Opinion concurring in part and dissenting in part filed by
    Circuit Judge KATSAS.
    PER CURIAM:** The Communications Act of 1934 restricts
    the rates that telecommunications carriers may charge for
    transmitting calls across their networks. AT&T contends that
    Aureon, an Iowa-based local carrier, for years charged it
    unlawful access rates.         The Federal Communications
    Commission agreed with some of AT&T’s claims but not
    others. On review, we consider three broad sets of issues:
    whether Aureon charged interstate and intrastate rates that
    violated certain transitional pricing rules, whether Aureon
    unlawfully engaged in or abetted a practice known as access
    stimulation, and whether Aureon’s interstate tariff covers the
    service it provided.
    I
    The protagonists in this case are AT&T and Iowa Network
    Services, also known as Aureon. AT&T is a long-distance or
    interexchange carrier—one that transmits calls between the
    networks of local carriers. For example, when an AT&T
    subscriber in New York calls someone in Chicago, AT&T
    connects the call between local networks in both cities.
    Historically, the calling party would pay AT&T, which in turn
    *
    Judge Katsas wrote Parts I, II, III, IV.B, and IV.C of the per
    curiam opinion; Judge Tatel wrote Part IV.A.
    **
    NOTE: Portions of this opinion contain Sealed Information,
    which has been redacted.
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    4
    would pay the appropriate local carriers. See In re FCC 11-
    161, 
    753 F.3d 1015
    , 1110–12 (10th Cir. 2014).
    In most parts of the country, each local carrier directly
    connects its network to that of each long-distance carrier. But
    in sparsely populated areas, this can be prohibitively expensive.
    In rural Iowa, local carriers solved the problem by forming
    Aureon as a joint venture. Aureon operates a set of switches
    connecting the networks of participating local carriers (known
    as subtending carriers) to those of long-distance carriers. So
    when an AT&T subscriber in New York calls someone in rural
    Iowa, AT&T connects the call from the local New York
    network to Aureon, which in turn connects it to the appropriate
    subtending carrier. See In re Application of Iowa Network
    Access Division, 3 FCC Rcd. 1468, 1468 (1988).
    Aureon charges long-distance carriers for connecting calls
    from their networks to those of its subtending carriers.
    Different regulatory systems govern its charges for interstate
    calls and for intrastate calls involving different local networks
    within Iowa. For interstate calls, the Communications Act
    provides that all charges must be “just and reasonable,” 47
    U.S.C. § 201(b), and reflected in tariffs filed with the FCC
    , id. § 203(a). To
    implement these provisions, the FCC has
    established various regulations governing access charges for
    interstate calls. See generally 47 C.F.R. ch. 1, subch. B.
    Historically, the states have regulated access charges for
    intrastate calls. See In re FCC 
    11-161, 753 F.3d at 1111
    .
    In recent years, the FCC has sought to transition away
    from inter-carrier access charges to a “bill-and-keep” approach.
    Recall the traditional arrangement for a long-distance call: the
    caller paid the long-distance carrier, which in turn paid access
    charges to local carriers at both ends. Under the new model,
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    the local carriers will bill their own customers and keep that
    revenue. This will have two major effects. First, the cost of a
    call will be split between the calling party and the called party.
    Second, local carriers will earn revenue from their own
    subscribers, rather than from access fees charged to long-
    distance carriers. See In re FCC 
    11-161, 753 F.3d at 1113
    .
    In 2011, the FCC promulgated regulations to start the
    transition to a bill-and-keep system for both interstate and
    intrastate calls. See Connect America Fund; A National
    Broadband Plan for Our Future; Establishing Just and
    Reasonable Rates for Local Exchange Carriers; High-Cost
    Universal Service Support, 76 Fed. Reg. 81,562 (Dec. 28,
    2011) (Transitional Pricing Rules). These regulations, which
    are called the “transitional access service pricing rules,”
    progressively reduce the access charges that carriers may
    charge one another. See 47 C.F.R. §§ 51.901–51.919.
    In the same rulemaking, the FCC also restricted a practice
    known as access stimulation. It involves enticing service
    providers that receive a high volume of calls, such as
    conference call services or adult hotlines, to locate in areas with
    high access charges, which are typically rural.                The
    combination of high access charges and high call volumes
    generates significant revenue for the local carriers. To secure
    that revenue, local carriers sometimes pay service providers to
    lure them to the area. “It’s a win-win for the [local carriers]
    and the conference call companies,” but a loss for the long-
    distance carriers. N. Valley Commc’ns, LLC v. FCC, 
    717 F.3d 1017
    , 1018–19 (D.C. Cir. 2013).
    Over the last decade, Aureon’s rate for intrastate access
    charges has remained the same, but the company has twice
    changed its interstate rate. In 2012, Aureon filed a tariff with
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    the FCC lowering its interstate rate from $0.00819 to $0.00623
    per minute. In 2013, Aureon filed another tariff raising the rate
    to $0.00896 per minute. Although the rate changes involve
    tenths of a penny, they add up to millions of dollars across the
    billions of calling minutes that Aureon services.
    AT&T has long believed that Aureon’s access charges
    violate the transitional pricing rules. AT&T thus has refused
    to pay Aureon’s invoices in full since September 2013. In
    2014, Aureon sued AT&T for the unpaid sums in the District
    of New Jersey. After AT&T made several counterclaims under
    the Communications Act, the district court referred the matter
    to the FCC under the doctrine of primary jurisdiction. See Iowa
    Network Servs., Inc. v. AT&T Corp., No. 14-cv-03439, 
    2015 WL 5996301
    (D.N.J. Oct. 14, 2015). That doctrine permits
    courts to stay cases involving “claims properly cognizable in
    court that contain some issue within the special competence of
    [the] agency.” Reiter v. Cooper, 
    507 U.S. 258
    , 268 (1993). A
    primary jurisdiction referral stays proceedings “so as to give
    the parties reasonable opportunity to seek an administrative
    ruling.”
    Id. AT&T then filed
    a complaint against Aureon under 47
    U.S.C. § 208, which permits administrative actions against
    telecommunications carriers. Four of AT&T’s allegations are
    relevant here: First, Aureon’s interstate and intrastate access
    charges violated the transitional pricing rules. Second, Aureon
    improperly engaged in access stimulation. Third, Aureon
    committed an unreasonable practice by agreeing with
    subtending carriers to connect calls involving access
    stimulation. Fourth, Aureon billed for service not covered by
    its 2013 interstate tariff.
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    In 2017, the FCC resolved the liability phase of the
    bifurcated proceeding. AT&T Corp. v. Iowa Network Servs.,
    Inc., 32 FCC Rcd. 9677 (2017). The agency agreed with
    AT&T’s first argument that Aureon’s access charges violated
    the transitional pricing rules. The Commission rejected
    AT&T’s second and fourth arguments relating to access
    stimulation and the scope of the tariff. Finally, the FCC
    declined to consider the third argument—that Aureon
    committed an unreasonable practice in aiding access
    stimulation by its subtending carriers—because another section
    208 complaint raised similar issues. After finding that
    Aureon’s interstate rates violated the transitional pricing rules,
    the agency ordered Aureon to file a new interstate tariff.
    Aureon has complied with that order, which is not at issue here.
    Damages issues remain pending.
    II
    AT&T and Aureon each seek review of portions of the
    FCC’s liability determination. We have jurisdiction under 47
    U.S.C. § 402(a) and 28 U.S.C. § 2342(1). In a bifurcated
    proceeding under section 208, we have held that a party may
    seek immediate review of liability determinations. Verizon Tel.
    Cos. v. FCC, 
    269 F.3d 1098
    , 1103–06 (D.C. Cir. 2001).
    The Administrative Procedure Act provides the familiar
    standard of review. As relevant here, we consider whether the
    FCC’s liability order was arbitrary, capricious, or inconsistent
    with governing statutes and regulations. 5 U.S.C. § 706(2)(A).
    III
    We begin with Aureon’s petition, which contests the
    FCC’s determination that Aureon violated the transitional
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    access service pricing rules. The FCC rested its determination
    on 47 C.F.R. § 51.911, which it calls Rule 51.911. That rule,
    which applies to competitive local exchange carriers, has three
    subsections. Subsection (a) prohibits the carriers from
    increasing their intrastate rates above those in effect on
    December 29, 2011. Subsection (b) requires the carriers to
    lower their intrastate rates by specified amounts beginning on
    July 3, 2012. Subsection (c) prohibits the carriers from
    charging higher rates than those charged by the competing
    incumbent local exchange carrier, effective July 1, 2013.
    The FCC found that Aureon violated Rule 51.911 in two
    respects: it violated subsection (b) by not lowering its intrastate
    rate on or after July 3, 2012; and it violated subsection (a) by
    increasing its interstate rate in 2013. AT&T Corp., 32 FCC
    Rcd. at 9689. In response, Aureon contends that Rule 51.911
    does not apply to it at all, and so none of its charges violated
    that rule. More narrowly, Aureon contends that the cap in
    subsection (a) applies only to intrastate rates, and so its 2013
    increase in interstate rates did not violate that subsection. We
    reject the broad argument but agree with the narrow one.
    A
    The transitional pricing rules cover Aureon’s services.
    Those rules “apply to reciprocal compensation for
    telecommunications        traffic      exchanged       between
    telecommunications providers that is interstate or intrastate
    exchange access, information access, or exchange services for
    such access, other than special access.” 47 C.F.R. § 51.901(b).
    Aureon provides interstate and intrastate “exchange access …
    services.” See J.A. 105 (Aureon’s tariff describing “Switched
    Access Services”). And it does not claim to offer exempt
    “special access” service, which involves the use of lines
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    dedicated to specific users. See WorldCom, Inc. v. FCC, 
    238 F.3d 449
    , 453 (D.C. Cir. 2001).
    The transitional pricing rules separately regulate three
    different categories of local carriers. Rule 51.907 applies to
    incumbent local exchange carriers operating under price-cap
    regulations; Rule 51.909 applies to incumbent local exchange
    carriers operating under rate-of-return regulations; and Rule
    51.911 applies to competitive local exchange carriers. See 47
    C.F.R. §§ 51.907, 51.909, 51.911. A “competitive local
    exchange carrier” is “any local exchange carrier, as defined in
    § 51.5, that is not an incumbent local exchange carrier.”
    Id. § 51.903. Aureon
    is a “local exchange carrier” because it “is
    engaged in the provision of telephone exchange service or
    exchange access.”
    Id. § 51.5. And
    it is not an “incumbent”
    carrier because it neither provided telephone exchange service
    in 1996 nor succeeded a carrier that did. 47 U.S.C. § 251(h);
    see J.A. 349 (Aureon arguing that it “is not an ILEC”). Because
    Aureon is a “local exchange carrier … that is not an
    incumbent,” the transitional pricing rules define it as a
    “competitive local exchange carrier,” 47 C.F.R. § 51.903(a),
    and thus subject it to regulation under Rule 51.911.
    In contending that Rule 51.911 does not apply, Aureon has
    little to say about the express regulatory definition of
    “competitive local exchange carriers.” Instead, Aureon
    attempts to exploit a separate regulatory distinction between
    dominant and nondominant carriers. Aureon invokes a cross-
    reference in Rule 51.911(c), which caps the rates for
    competitive local exchange carriers at certain rates “charged by
    the competing incumbent local exchange carrier, in accordance
    with the same procedures specified in” 47 C.F.R. § 61.26. Rule
    61.26 is limited to “nondominant carriers,”
    id. § 61.18, which
    are carriers that have not been “found by the Commission to
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    10
    have market power,”
    id. § 61.3(q), (z).
    Rule 61.26 does not
    apply to Aureon, which the FCC has found to have market
    power. See In re Application of Iowa Network Access Division,
    3 FCC Rcd. 1468 at ¶ 10. But Rule 51.911 is not so limited.
    By its terms, it applies to all “competitive local exchange
    carriers,” and Aureon clearly falls into that category.
    Moreover, neither Rule 51.911(a) nor Rule 51.911(b)—the
    specific provisions that the FCC found Aureon to have
    violated—contains the allegedly limiting reference to Rule
    61.26. Even Rule 51.911(c) uses rates charged by “incumbent”
    local carriers to establish price caps that apply to all
    “competitive” local carriers—a category that includes Aureon.
    And the incorporation into Rule 51.911(c) of “procedures” set
    forth elsewhere does nothing to restrict its applicability to all
    competitive carriers.1
    Because Rule 51.911 applies to Aureon, we affirm the
    FCC’s conclusion that Aureon violated subsection (b) by not
    lowering its intrastate rate as required.2
    B
    Aureon next contends that the 2013 increase of its
    interstate rate did not violate Rule 51.911(a). We agree. That
    1
    The FCC reserved the question whether Aureon’s 2013 tariff
    violated Rule 51.911(c). AT&T Corp., 32 FCC Rcd. at 9689. We
    have explained why that provision applies to all competitive local
    exchange carriers, but we too reserve whether Aureon violated it.
    2
    Aureon contends that applying the transitional pricing rules to
    it violates due process. But there is no failure of notice, and thus no
    due-process violation, in applying regulations as they are written.
    See NetworkIP, LLC v. FCC, 
    548 F.3d 116
    , 123 (D.C. Cir. 2008).
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    11
    rule provides that a competitive local exchange carrier may not
    “increase the rate for any originating or terminating intrastate
    switched access service above the rate for such service in effect
    on December 29, 2011.” 47 C.F.R. § 51.911(a)(1), (2). In
    contrast, the parallel provisions for incumbent local exchange
    carriers cap “intrastate” and “interstate” rates as of December
    29, 2011.
    Id. §§ 51.907(a), 51.909(a)(1),
    (2). Thus, Rule
    51.911(a) does not cap the interstate rates of competitive
    carriers like Aureon.3
    The FCC asks us to depart from the plain meaning of this
    regulation based on statements that it made in an explanatory
    document published shortly after the transitional pricing rules
    became effective. See Transitional Pricing Rules, 76 Fed. Reg.
    at 81,562. This document describes those rules as “capping all
    interstate switched access rates in effect as of” December 29,
    2011. See
    id. at 81,630.
    But “[b]ecause the regulation itself is
    clear, we need not evaluate” either the regulatory “preamble”
    or any other document that “itself lacks the force and effect of
    law.” Saint Francis Med. Ctr. v. Azar, 
    894 F.3d 290
    , 297 (D.C.
    Cir. 2018).4
    3
    The FCC briefly suggests that Rule 51.905 governs this
    analysis. It requires local exchange carriers to file tariffs consistent
    with “the default transitional rates specified by this subpart.” 47
    C.F.R. § 51.905(b). For competitive local exchange carriers such as
    Aureon, Rule 51.911 sets forth those rates.
    4
    The parties reference the disputed statements as they appear
    in the FCC Record. See 26 FCC Rcd. 17,663, at ¶ 800–01. We
    reference the Federal Register because agencies “must publish
    substantive rules in the Federal Register to give them effect.” NRDC
    v. EPA, 
    559 F.3d 561
    , 565 (D.C. Cir. 2009); see 5 U.S.C. § 552(a)(1).
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    12
    The FCC contends that its explanatory statements,
    published in the Federal Register, should be treated as part of
    the binding regulation. It is mistaken. “Publication in the
    Federal Register does not suggest that the matter published was
    meant to be a regulation, since the APA requires general
    statements of policy to be published as well.” Brock v.
    Cathedral Bluffs Shale Oil Co., 
    796 F.2d 533
    , 539 (D.C. Cir.
    1986) (Scalia, J.) (citing 5 U.S.C. § 552(a)(1)(D)). Instead, the
    “real dividing point” between the portions of a final rule with
    and without legal force is designation for “publication in the
    Code of Federal Regulations.”
    Id. To be sure,
    we have
    reserved a possibility that statements in a preamble “may in
    some unique cases constitute binding, final agency action
    susceptible to judicial review.” NRDC v. EPA, 
    559 F.3d 561
    ,
    565 (D.C. Cir. 2009) (citing Kennecott Utah Copper Corp. v.
    Dep’t of Interior, 
    88 F.3d 1191
    , 1222–23 (D.C. Cir. 1996)).
    But “this is not the norm” because “[a]gency statements
    ‘having general applicability and legal effect’ are to be
    published in the Code of Federal Regulations.”
    Id. (quoting 44 U.S.C.
    § 1510(a)). And where, as here, there is a discrepancy
    between the preamble and the Code, it is the codified
    provisions that control. For example, if a preamble purports to
    establish the regulatory treatment of “high wind events” but the
    regulations as published in the Code do not, then the preamble
    statement is a nullity. See NRDC v. 
    EPA, 559 F.3d at 565
    . The
    same must be true for an explanatory document published not
    with the codified regulations, but shortly thereafter.
    Alternatively, the FCC invokes a “note” to Rule 51.901
    cross-referencing a “chart identifying steps in the transition.”
    As explained below, they must also publish them in the Code of
    Federal Regulations.
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    13
    47 C.F.R. § 51.901, note. The chart appears in the explanatory
    document mentioned above. It is a one-page, summary
    document that simply asserts—without citation—that the
    transitional pricing rules cap “interstate” switched access rates
    as of their effective date. See Transitional Pricing Rules, 76
    Fed. Reg. at 81,631. The FCC tries to do too much with too
    little. For one thing, dropping a “note” referencing a summary
    “chart” would be a strange way to add to the rules being
    summarized. In any event, such a chart could hardly override
    the plain meaning of the rules themselves. Moreover, specific
    provisions qualify general ones. See, e.g., Robertson v. Seattle
    Audubon Soc’y, 
    503 U.S. 429
    , 440 (1992). The fine print in
    Rule 51.911 is far more specific than the summary chart. And,
    as we have shown, it leaves no doubt that the 2011 price cap
    applies only to “intrastate” rates. We thus apply the transitional
    pricing rules as written.
    For these reasons, we set aside the FCC’s determination
    that Aureon violated Rule 51.911(a) by increasing its rate for
    interstate access charges in 2013.5
    5
    Aureon raises various other arguments that we do not reach.
    Without elaboration, it suggests that the FCC lacks authority to limit
    intrastate rates and that the transitional pricing rules effect an
    unconstitutional taking. But “[a] litigant does not properly raise an
    issue by addressing it in a cursory fashion with only bare-bones
    arguments.” Cement Kiln Recycling Coal. v. EPA, 
    255 F.3d 855
    , 869
    (D.C. Cir. 2001) (cleaned up). Aureon further invokes 47 U.S.C.
    § 204(a)(3), which provides that interstate tariffs filed by local
    exchange carriers “shall be deemed lawful” unless the FCC acts upon
    them within 15 days. Aureon contends that section 204(a)(3)
    prevents the award of damages for any violation of Rule 51.911(a)
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    IV
    We next turn to AT&T’s petitions, which address the
    FCC’s rulings on access stimulation, unreasonable practices,
    and the scope of Aureon’s tariffs.
    A
    AT&T contends that Aureon’s charges were unlawful
    because Aureon was engaged in access stimulation, i.e.,
    enticing high call volumes to generate increased access
    charges. The FCC has made various efforts to curb that
    practice, which it considers “wasteful arbitrage.” Updating the
    Intercarrier Compensation Regime to Eliminate Access
    Arbitrage, 84 Fed. Reg. 57,629, 57,630 (Oct. 28, 2019)
    (Updating Rule).
    Rule 61.3(bbb) represents one of those efforts. Although
    the FCC has since amended the regulation to exclude carriers,
    like Aureon, that serve no end-users, see
    id. at 57,651,
    during
    the events at issue here, Rule 61.3(bbb) limited charges by any
    local exchange carrier “engaging in access stimulation,” 47
    C.F.R. § 61.3(bbb)(2) (2012). For our purposes, then, access
    stimulation involves (A) maintaining an “access revenue
    sharing agreement” and (B) servicing more than three times as
    many incoming calls as outgoing calls.
    Id. § 61.3(bbb)(1)(i). The
    parties agree Aureon met the second requirement. The
    question, then, is whether the FCC’s conclusion that Aureon’s
    contracts with its subtending carriers do not qualify as “access
    revenue sharing agreements” was reasonable. It was not.
    in this case. Having found no such violation, we need not reach this
    damages issue.
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    15
    As relevant here, section 61.3(bbb) defines an “access
    revenue sharing agreement” as an agreement between a local
    exchange carrier and another party that
    over the course of the agreement, would directly or
    indirectly result in a net payment to the other party
    (including affiliates) to the agreement, in which
    payment by the ... Competitive Local Exchange
    Carrier is based on the billing or collection of access
    charges from interexchange carriers or wireless
    carriers. When determining whether there is a net
    payment under this rule, all payments, discounts,
    credits, services, features, functions, and other items
    of value, regardless of form, provided by
    the ... Competitive Local Exchange Carrier to the
    other party to the agreement shall be taken into
    account.
    Id. § 61.3(bbb)(1)(i). In
    short, the agreement must result in a
    “net payment” from the carrier to a counterparty, which must
    be “based on the billing or collection of access charges.”
    The FCC reasoned that Aureon’s agreements were not
    covered because neither the agreements themselves, nor the
    “net payment[s]” to the subtending carriers, were “intended to
    facilitate access stimulation.” AT&T Corp., 32 FCC Rcd. at
    9693. But the FCC never explained why Aureon’s purported
    lack of intent mattered. After all, nothing in the definition of
    an “access revenue sharing agreement” suggests an intent
    requirement; to the contrary, the regulation provides that such
    agreements must “result in” a net payment, thus focusing on
    effects rather than intent. 47 C.F.R. § 61.3(bbb)(1)(i) (2012).
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    What’s more, the FCC failed to acknowledge its own prior
    statement on what counts as an access revenue sharing
    agreement. In 2012, the FCC “clarif[ied]” that the “based on”
    language of section 61.3(bbb) is to be construed broadly,
    explaining that “any arrangement between a LEC and another
    party ... that results in the generation of switched access traffic
    to the LEC and provides for the net payment of consideration
    of any kind ... to the other party, ... is considered to be ‘based
    upon the billing or collection of access charges.’” Connect
    America Fund; A National Broadband Plan for Our Future;
    Establishing Just and Reasonable Rates for Local Exchange
    Carriers; High-Cost Universal Service Support, 77 Fed. Reg.
    14,297, 14,301 (Mar. 9, 2012) (Clarification Rule). But in
    rejecting AT&T’s access-stimulation claim, the FCC nowhere
    acknowledged this prior interpretation, a particularly glaring
    omission given that the agency’s newfound intent requirement
    appears inconsistent with the clarification’s expansive
    construction of section 61.3(bbb)’s regulatory language.
    Because “the process by which [the FCC] reache[d] [its final]
    result” was neither “logical [nor] rational,” we vacate its
    decision. Fox v. Clinton, 
    684 F.3d 67
    , 75 (D.C. Cir. 2012)
    (quoting Tripoli Rocketry Association, Inc. v. Bureau of
    Alcohol, Tobacco, Firearms, & Explosives, 
    437 F.3d 75
    , 77
    (D.C. Cir. 2006)).
    The dissent likewise finds the FCC’s reasoning inadequate
    but would nevertheless uphold the agency’s decision on the
    ground that the regulation left the FCC no discretion to reject
    AT&T’s claim. United Video, Inc. v. FCC, 
    890 F.2d 1173
    ,
    1190 (D.C. Cir. 1989) (acknowledging that vacatur and remand
    “is not necessary” if “the agency has come to a conclusion to
    which it was bound to come as a matter of law, albeit for the
    wrong reason”). As the dissent sees it, the regulatory language
    unambiguously excludes Aureon’s contracts with its
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    18
    violated this provision by agreeing to transmit calls reflecting
    access stimulation by subtending carriers. The FCC declined
    to reach this claim because a different administrative complaint
    filed by AT&T, against one of the subtending carriers, raised
    similar issues. AT&T argues that the FCC’s refusal to
    adjudicate its claim was contrary to law. We agree.
    AT&T lodged its complaint under section 208 of the
    Communications Act. That provision imposes a series of
    mandatory obligations to ensure the prompt and orderly
    disposition of complaints: The FCC must “investigate the
    matters complained of in such manner and by such means as it
    shall deem proper.” 47 U.S.C. § 208(a). The FCC must “issue
    an order concluding such investigation” within five months.
    Id. § 208(b)(1). And
    the order “shall be” final and appealable.
    Id. § 208(b)(3). In
    AT&T Co. v. FCC, 
    978 F.2d 727
    (D.C. Cir. 1992), we
    held that this scheme requires the FCC to adjudicate section
    208 complaints properly presented to it. There, the FCC
    declined to adjudicate a complaint that it thought “would be
    better considered in a rulemaking.”
    Id. at 731.
    We held that
    this refusal was unlawful because section 208 imposes on the
    FCC, in its capacity “as an adjudicator of private rights,” “an
    obligation to decide the complaint under the law currently
    applicable.”
    Id. at 732.
    The same obligation governs here,
    despite the FCC’s desire to forgo a decision and resolve related
    issues in another case.
    In MCI Worldcom Network Services, Inc. v. FCC, 
    274 F.3d 542
    (D.C. Cir. 2001), we recognized a limited exception
    to the FCC’s duty to decide section 208 complaints. In that
    case, the FCC declined to entertain a claim that was “parallel”
    with and “duplicative” of claims in state administrative
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    19
    proceedings.
    Id. at 548.
    Moreover, the complainant sought “no
    relief from the FCC that the state public utility commissions
    [could not] grant.”
    Id. Under those circumstances,
    we held
    that it was “reasonable for the FCC to defer to the states as a
    matter of comity.”
    Id. Here, in contrast,
    there is no state
    proceeding to defer to. Moreover, AT&T is seeking damages
    from Aureon—relief that the FCC could not grant in a separate
    proceeding to which Aureon is not a party. And the question
    that AT&T seeks to raise, whether it was an unreasonable
    practice for Aureon to connect calls to subtending carriers
    engaged in access stimulation, goes well beyond the question
    whether any individual subtending carrier was so engaged.
    We stress that our holding is narrow. Section 208 gives
    the FCC discretion over the “manner” and “means” of
    investigating a complaint, 47 U.S.C. § 208(a), which we have
    said allows the FCC to assign complaining parties the burden
    of proof, see Hi-Tech Furnace Sys., Inc. v. FCC, 
    224 F.3d 781
    ,
    785–87 (D.C. Cir. 2000). The agency thus retains traditional
    enforcement discretion in deciding whether or how to
    investigate AT&T’s complaint. See id.; Sprint Commc’ns Co.
    v. FCC, 
    76 F.3d 1221
    , 1227–31 (D.C. Cir. 1996). But “as an
    adjudicator,” the FCC must “decide” claims properly presented
    to it, 
    AT&T, 978 F.2d at 732
    , at least absent some federalism-
    based justification for deferring to parallel state proceedings
    The FCC thus erred in refusing to adjudicate AT&T’s
    unreasonable-practices claim.6
    6
    Aureon contends that AT&T is collaterally estopped from
    arguing that connecting calls to access-stimulating carriers is an
    unreasonable practice. The FCC did not decide this question, which
    we leave open on remand.
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    20
    C
    Finally, AT&T challenges the FCC’s determination that
    Aureon’s existing interstate tariff covers traffic involving
    subtending carriers engaged in access stimulation. We defer to
    the FCC’s interpretation of a tariff if it is “reasonable and based
    upon factors within the Commission’s expertise.” Am.
    Message Ctrs. v. FCC, 
    50 F.3d 35
    , 39 (D.C. Cir. 1995) (cleaned
    up). Here, the scope of Aureon’s tariff presents highly
    technical questions that the FCC reasonably resolved.
    The tariff provides rates for “switched access service,”
    which it defines to include
    a two-point electrical communications path between a
    point of interconnection with the transmission
    facilities of an Exchange Telephone Company … and
    [Aureon’s] central access tandem where the
    Customer’s traffic is switched to originate or
    terminate its communications.
    J.A. 196. The parties agree that Aureon provides “switched
    access service” by routing calls from long-distance carriers to
    the local exchange carriers that subtend its network.
    AT&T highlights other tariff language repeatedly
    describing Aureon’s service as “Centralized Equal Access
    Service.” In AT&T’s view, Aureon does not provide such a
    service when it transmits calls involving access-stimulating
    carriers. But in its own complaint, AT&T described “equal
    access service” as simply the local carrier providing all long-
    distance carriers with equivalent connections. The FCC
    adopted this definition. See AT&T Corp., 32 FCC Rcd. at 9678.
    AT&T does not allege that Aureon failed to provide all long-
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    21
    distance carriers with equivalent connections to the networks
    of subtending carriers. More generally, AT&T suggests that
    the tariff distinguishes between calls reflecting access
    stimulation and other calls. But the FCC concluded that the
    tariff does not categorize calls in that way, and AT&T points
    to no tariff language to the contrary.
    Alternatively, AT&T contends that equal access service
    involves only outgoing calls. But the tariff describes Aureon’s
    service to occur when a customer’s “traffic is switched to
    originate or terminate its communications.” J.A. 196.
    Moreover, before the agency, AT&T stipulated that Aureon’s
    authorized service covered both originating and terminating
    traffic. That makes good sense, as AT&T provides no reason
    why Aureon would seek to provide, or the FCC would approve,
    a service to enable the connection of calls flowing in one
    direction but not the other.
    We affirm the FCC’s determination that Aureon’s
    interstate tariffs apply to traffic involving any local carriers
    engaged in access stimulation.
    V
    The petitions for review are granted in part and denied in
    part. We remand this case to the FCC for further proceedings
    consistent with this opinion.
    So ordered.
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    KATSAS, Circuit Judge, concurring in part and dissenting
    in part: I join the per curiam opinion except for Part IV.A,
    which remands for further consideration of whether Aureon
    engaged in access stimulation. In my view, the governing
    regulation unambiguously establishes that Aureon did not.
    Thus, even though the FCC’s reasoning on this point was
    faulty, a remand is unnecessary.
    As my colleagues explain, the question about access
    stimulation turns on whether Aureon provided its subtending
    carriers with a “net payment” that was “based on the billing or
    collection of access charges.” 47 C.F.R. § 61.3(bbb)(1)(i)(A)
    (2012). I agree with my colleagues that this question does not
    turn on Aureon’s intent, so we cannot affirm on the reasoning
    provided by the FCC below. Ante at 15. But unlike my
    colleagues, I would hold that the benefit provided by Aureon
    to its subtending carriers was not “based on the billing or
    collection of access charges.” And because the FCC was
    bound to reach this conclusion as a matter of law, vacating its
    decision on this point is unnecessary.
    Of course, we cannot affirm a discretionary agency
    decision based on reasoning not given by the agency. SEC v.
    Chenery Corp., 
    318 U.S. 80
    , 88, 94 (1943). But “Chenery only
    applies to agency actions that involve policymaking or other
    acts of agency discretion.” Canonsburg Gen. Hosp. v. Burwell,
    
    807 F.3d 295
    , 305 (D.C. Cir. 2015) (cleaned up). A Chenery
    remand “is not necessary” if “the agency has come to a
    conclusion to which it was bound to come as a matter of law.”
    United Video, Inc. v. FCC, 
    890 F.2d 1173
    , 1190 (D.C. Cir.
    1989). In that circumstance, “[t]o remand would be an idle and
    useless formality,” and “Chenery does not require that we
    convert judicial review of agency action into a ping-pong
    game.” Morgan Stanley Capital Grp. Inc. v. Pub. Util. Dist.
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    3
    Reasonable Rates for Local Exchange Carriers; High-Cost
    Universal Service Support, 77 Fed. Reg. 14,297, 14,301 (Mar.
    9, 2012) (Interpretive Rule).
    In my judgment, this Interpretive Rule does not reasonably
    construe the governing regulation, at least as applied to inter-
    carrier connection agreements. By its terms, the access
    stimulation regulation does not apply unless a local exchange
    carrier forms an “access revenue sharing agreement” with
    another party that satisfies two distinct requirements: (1) the
    agreement must “result in a net payment” to the other party,
    and (2) this payment must be “based on the billing or collection
    of access charges” from long-distance carriers. 47 C.F.R.
    § 61.3(bbb)(1)(i)(A). By contrast, the Interpretive Rule
    requires only that the agreement “result in” more traffic for the
    local exchange carrier, which will be true for any connection
    agreement, and that the agreement “provide for” a net payment
    to the other party, which seems equivalent to requiring that the
    agreement “result in” a net payment to that party. On this
    understanding, the Interpretive Rule collapses the regulation’s
    second requirement into its first, eliminating the need for a
    carrier’s net payment to be “based on the billing or collection
    of access charges.” We should not tolerate a construction that
    creates such obvious and inexplicable surplusage. See, e.g.,
    Duncan v. Walker, 
    533 U.S. 167
    , 174 (2001).
    The FCC understands its Interpretive Rule differently.
    The agency highlights the statement that an access revenue
    sharing agreement must “provid[e] for” a net payment from the
    local carrier to a third party. According to the FCC, this
    language means that the agreement must be intended to induce
    access stimulation, rather than that the agreement simply must
    result in a net payment to the third party. Even assuming that
    this reflects a permissible reading of the Interpretive Rule,