ACA International v. FCC , 885 F.3d 687 ( 2018 )


Menu:
  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued October 19, 2016               Decided March 16, 2018
    No. 15-1211
    ACA INTERNATIONAL, ET AL.,
    PETITIONERS
    v.
    FEDERAL COMMUNICATIONS COMMISSION AND UNITED
    STATES OF AMERICA,
    RESPONDENTS
    CAVALRY PORTFOLIO SERVICES, LLC, ET AL.,
    INTERVENORS
    Consolidated with 15-1218, 15-1244, 15-1290, 15-1304,
    15-1306, 15-1311, 15-1313, 15-1314, 15-1440, 15-1441
    On Petitions for Review of an Order of
    the Federal Communications Commission
    Shay Dvoretzky argued the cause for petitioners ACA
    International, et al. With him on the joint briefs were Helgi
    C. Walker, Monica S. Desai, Amy L. Brown, Jonathan Jacob
    Nadler, Christopher J. Wright, Jennifer P. Bagg, Elizabeth
    Austin Bonner, Robert A. Long, Yaron Dori, Brian Melendez,
    Tonia Ouellette Klausner, Keith E. Eggleton, Kate Comerford
    2
    Todd, Steven P. Lehotsky, and Warren Postman. Lindsay S.
    See entered an appearance.
    Charles R. Messer, pro se, was on the brief for amicus
    curiae Charles R. Messer in support of ACA International=s
    petition.
    Paul Werner argued the cause for petitioner Rite Aid
    Hdqtrs. Corp. With him on the briefs was Brian Weimer.
    Thomas C. Mugavero, Steven A. Augustino, Jonathan E.
    Paikin, Jonathan G. Cedarbaum, Blaine C. Kimrey, and
    Bryan K. Clark were on the joint briefs for intervenors MRS
    BPO LLC, et al. in support of petitioners.
    Don L. Bell, II was on the brief for amicus curiae The
    National Association of Chain Drug Stores, Inc. in support of
    petitioner Rite Aid Hdqtrs. Corp.
    H. Russell Frisby, Jr., Harvey L. Reiter, Aryeh Fishman,
    Michael Murray, and Jay Morrison were on the brief for
    amici curiae American Gas Association, et al. in support of
    petitioners.
    Charles H. Kennedy was on the brief for amici curiae
    The American Bankers Association, Credit Union National
    Association and The Independent Community Bankers of
    America in support of petitioners.
    Andrew B. Clubok, Susan E. Engel, and Devin S.
    Anderson were on the brief for amicus curiae The Internet
    Association in support of petitioners.
    Joseph R. Palmore and Seth W. Lloyd were on the brief
    for amici curiae Retail Litigation Center, Inc., National Retail
    3
    Federation, and National Restaurant Association in support of
    petitioners.
    Bryan N. Tramont and Russell P. Hanser were on the
    brief for amicus curiae CTIA-The Wireless Association in
    support of petitioners.
    Eric J. Troutman was on the brief for amici curiae
    American Financial Services Association, Consumer
    Mortgage Coalition, and Mortgage Bankers Association in
    support of petitioners. Jan T. Chilton and Kerry W. Frarnich
    entered appearances.
    Amy M. Gallegos was on the brief for amicus curiae
    Communication Innovators in support of petitioners.
    Scott M. Noveck, Counsel, Federal Communications
    Commission, argued the cause for respondents. With him on
    the brief were William J. Baer, Assistant Attorney General,
    U.S. Department of Justice, Kristen C. Limarzi, Steven J.
    Mintz, Attorneys, Jonathan B. Sallet, General Counsel,
    Federal Communications Commission, David M. Gossett,
    Deputy General Counsel, and Jacob M. Lewis, Associate
    General Counsel.
    Craig L. Briskin and Julie Nepveu were on the brief for
    amici curiae National Consumer Law Center, et al. in support
    of the Federal Communications Commission 2015 Omnibus
    Declaratory Ruling and Order.
    Marc Rotenberg and Alan Butler were on the brief for
    amici curiae Electronic Privacy Information Center (EPIC)
    and Six Consumer Privacy Organizations in support of
    respondents.
    4
    Before: SRINIVASAN and PILLARD, Circuit Judges, and
    EDWARDS, Senior Circuit Judge.
    Opinion for the Court filed by Circuit Judge SRINIVASAN.
    SRINIVASAN, Circuit Judge: Unwanted robocalls are an
    all-too-familiar phenomenon. For years, consumers have
    complained to the Federal Communications Commission
    about automated telemarketing calls and text messages that
    they did not seek and cannot seem to stop.
    Congress sought to address consumers’ concerns with
    undesired robocalls in the Telephone Consumer Protection
    Act of 1991. The TCPA generally prohibits the use of certain
    kinds of automated dialing equipment to call wireless
    telephone numbers absent advance consent. The Act vests the
    Commission with authority to implement those restrictions.
    In this case, a number of regulated entities seek review of
    a 2015 order in which the Commission sought to clarify
    various aspects of the TCPA’s general bar against using
    automated dialing devices to make uninvited calls. The
    challenges encompass four issues addressed by the agency’s
    order: (i) which sorts of automated dialing equipment are
    subject to the TCPA’s restrictions on unconsented calls; (ii)
    when a caller obtains a party’s consent, does a call
    nonetheless violate the Act if, unbeknownst to the caller, the
    consenting party’s wireless number has been reassigned to a
    different person who has not given consent; (iii) how may a
    consenting party revoke her consent; and (iv) did the
    Commission too narrowly fashion an exemption from the
    TCPA’s consent requirement for certain healthcare-related
    calls.
    5
    We uphold the Commission’s approach to revocation of
    consent, under which a party may revoke her consent through
    any reasonable means clearly expressing a desire to receive
    no further messages from the caller. We also sustain the
    scope of the agency’s exemption for time-sensitive healthcare
    calls.
    We set aside, however, the Commission’s effort to clarify
    the types of calling equipment that fall within the TCPA’s
    restrictions. The Commission’s understanding would appear
    to subject ordinary calls from any conventional smartphone to
    the Act’s coverage, an unreasonably expansive interpretation
    of the statute. We also vacate the agency’s approach to calls
    made to a phone number previously assigned to a person who
    had given consent but since reassigned to another
    (nonconsenting) person. The Commission concluded that
    calls in that situation violate the TCPA, apart from a one-call
    safe harbor, regardless of whether the caller has any
    awareness of the reassignment. We determine that the
    agency’s one-call safe harbor, at least as defended in the
    order, is arbitrary and capricious.
    We therefore grant the petitions for review in part and
    deny them in part.
    I.
    The federal government’s efforts to combat unwanted
    robocalls have spanned nearly three decades, involving two
    federal agencies and a number of congressional enactments.
    In the Telemarketing and Consumer Fraud and Abuse
    Prevention Act of 1994, 
    15 U.S.C. § 6101
     et seq., Congress
    empowered the Federal Trade Commission to regulate the
    telemarketing industry. The FTC’s measures include a
    general bar against calling any telephone number on the “do-
    6
    not-call registry” without consent or an established business
    relationship. 
    16 C.F.R. § 310.4
    (b)(1)(iii)(B); see 
    15 U.S.C. § 6151
    (a). This case does not concern the FTC’s initiatives.
    This case instead concerns the Federal Communications
    Commission’s efforts to combat unwanted robocalls pursuant
    to its authority under the TCPA. Some of the Commission’s
    restrictions on telemarketing calls mirror measures established
    by the FTC. Compare 
    16 C.F.R. §§ 310.4
    (b)(1)(iii)(B),
    310.4(c), with 
    47 C.F.R. § 64.1200
    (c). But the agencies’
    initiatives also differ in various respects. Of relevance here,
    only the TCPA specifically restricts the use of an “automatic
    telephone dialing system” to make calls.            
    47 U.S.C. § 227
    (b)(1)(A). Petitioners challenge the Commission’s
    interpretation and implementation of various TCPA
    provisions pertaining to automated dialing equipment.
    A.
    Congress enacted the TCPA in 1991 based on findings
    that the “use of the telephone to market goods and services to
    the home and other businesses” had become “pervasive due to
    the increased use of cost-effective telemarketing techniques.”
    
    47 U.S.C. § 227
     note, Pub. L. No. 102-243, § 2(1), 
    105 Stat. 2394
    , 2394. “Many consumers,” Congress determined, “are
    outraged over the proliferation of intrusive, nuisance calls to
    their homes from telemarketers.” 
    Id.
     § 2(6)-(7).
    The TCPA restricts calls both “to any residential
    telephone line” and to “any telephone number assigned to a
    . . . cellular telephone service.” 
    47 U.S.C. § 227
    (b)(1)(A)(iii),
    (B). This case solely concerns the latter restrictions on
    telephone calls to wireless numbers.
    7
    Congress, in that regard, made it “unlawful . . . to make
    any call (other than a call made for emergency purposes or
    made with the prior express consent of the called party) using
    any automatic telephone dialing system . . . to any telephone
    number assigned to a . . . cellular telephone service,” “unless
    such call is made solely to collect a debt owed to or
    guaranteed by the United States.” 
    Id.
     § 227(b)(1)(A)(iii).
    The statute defines an “automatic telephone dialing system”
    (ATDS, or autodialer) as “equipment which has the
    capacity—(A) to store or produce telephone numbers to be
    called, using a random or sequential number generator; and
    (B) to dial such numbers.” Id. § 227(a)(1).
    In short, the TCPA generally makes it unlawful to call a
    cell phone using an ATDS. And an ATDS is equipment with
    the “capacity” to perform each of two enumerated functions:
    (i) storing or producing telephone numbers “using a random
    or sequential number generator” and (ii) dialing those
    numbers. The general prohibition on autodialer calls to
    wireless numbers is subject to three exceptions. The central
    exception for purposes of this case is for calls made with
    “prior express consent.” There are also exceptions for
    emergency calls and calls made to collect government debts.
    The TCPA vests the Commission with responsibility to
    promulgate regulations implementing the Act’s requirements.
    Id. § 227(b)(2). The Act also grants the Commission specific
    authority to fashion exemptions from the general prohibition
    on autodialer calls to wireless numbers, where the calls are
    “not charged to the called party.” Id. § 227(b)(2)(C). As
    Congress explained, the FCC “should have the flexibility to
    design different rules for those types of automated or
    prerecorded calls that it finds are not considered a nuisance or
    invasion of privacy.” Id. § 227 note, Pub. L. No. 102-243,
    § 2(13), 
    105 Stat. 2394
    , 2395.
    8
    Since the TCPA’s enactment, the FCC has issued a series
    of rulemakings and declaratory rulings addressing the Act’s
    reach. In 2003, for instance, the agency concluded that the
    statute’s restrictions on “mak[ing] any call” using an ATDS
    encompass the sending of text messages. See In re Rules and
    Regulations Implementing the Telephone Consumer
    Protection Act of 1991 (2003 Order), 18 FCC Rcd. 14,014,
    14,115 ¶ 165 (2003).
    The Act contains a private right of action permitting
    aggrieved parties to recover at least $500 in damages for each
    call made (or text message sent) in violation of the statute,
    and up to treble damages for each “willful[] or knowing[]”
    violation. 
    47 U.S.C. § 227
    (b)(3). There is no cap on the
    amount of recoverable damages. The Commission has noted
    a surge in TCPA lawsuits (including class actions) in recent
    years, likely attributable in part to the “skyrocketing growth
    of mobile phones.”           In re Rules and Regulations
    Implementing the Telephone Consumer Protection Act of
    1991 (2015 Declaratory Ruling), 30 FCC Rcd. 7961, 7970
    ¶¶ 6-7 (2015).
    B.
    In a Declaratory Ruling and Order issued in 2015, the
    Commission (with two Commissioners dissenting) addressed
    21 separate petitions for rulemaking or requests for
    clarification. In this court, petitioners and intervenors seek
    review of four aspects of the Commission’s order.
    First, the Commission sought to clarify which devices for
    making calls qualify as an ATDS—i.e., equipment that “has
    the capacity” to “store or produce telephone numbers to be
    called, using a random or sequential number generator,” and
    “to dial such numbers.” 
    47 U.S.C. § 227
    (a)(1). With regard
    9
    to whether equipment has the “capacity” to perform the
    enumerated functions, the Commission declined to define a
    device’s “capacity” in a manner confined to its “present
    capacity.”    Instead, the agency construed a device’s
    “capacity” to encompass its “potential functionalities” with
    modifications such as software changes. 2015 Declaratory
    Ruling, 30 FCC Rcd. at 7974 ¶ 16.
    The Commission also addressed the precise functions that
    a device must have the capacity to perform for it to be
    considered an ATDS. The Commission reaffirmed prior
    orders deciding that “predictive dialers”—equipment that can
    dial automatically from a given list of telephone numbers
    using algorithms to predict “when a sales agent will be
    available”—qualify as autodialers. 
    Id.
     at 7972 ¶ 10 & n.39.
    The Commission further explained that a “basic function[]” of
    an autodialer is to “dial numbers without human
    intervention.” 
    Id.
     at 7975 ¶ 17. At the same time, the
    Commission also declined to “clarify[] that a dialer is not an
    autodialer unless it has the capacity to dial numbers without
    human intervention.” 
    Id.
     at 7976 ¶ 20.
    Second, the Commission spoke to whether, and when, a
    caller violates the TCPA by calling a wireless number that has
    been reassigned from a consenting party to another person
    without the caller’s knowledge. The Act specifically permits
    autodialer calls “made with the prior express consent of the
    called party.” 
    47 U.S.C. § 227
    (b)(1)(A). If the “called party”
    for those purposes refers to the intended recipient of a call or
    message, a caller would face no liability when using an ATDS
    to call a number believed to belong to a consenting party,
    even if the number in fact has been reassigned to another
    person who has not consented.
    10
    The Commission, though, determined that the term
    “called party” refers not to “the intended recipient of a call”
    but instead to “the current subscriber” (i.e., the current,
    nonconsenting holder of a reassigned number rather than a
    consenting party who previously held the number). 2015
    Declaratory Ruling, 30 FCC Rcd. at 7999 ¶ 72. But the
    Commission did not hold a caller strictly liable when unaware
    that the consenting party’s number has been reassigned to
    another person. Instead, the agency allowed one—and only
    one—liability-free, post-reassignment call for callers who
    lack “knowledge of [the] reassignment” and possess “a
    reasonable basis to believe that they have valid consent.” 
    Id.
    at 8000 ¶ 72.
    Third, the Commission clarified the ways in which a
    consenting party can revoke her consent to receive autodialer
    calls.   The Commission decided that callers may not
    unilaterally designate the acceptable means of revocation. It
    also declined to prescribe its own set of mandatory revocation
    procedures. Rather, it concluded that “a called party may
    revoke consent at any time and through any reasonable
    means”—whether orally or in writing—“that clearly
    expresses a desire not to receive further messages.” 
    Id.
     at
    7989-90 ¶ 47; 
    id.
     at 7996 ¶ 63.
    Fourth, and finally, the Commission exempted from the
    autodialer provision’s consent requirement certain calls to
    wireless numbers “for which there is exigency and that have a
    healthcare treatment purpose.” 
    Id.
     at 8031 ¶ 146. It declined,
    however, to give the exemption the reach desired by certain
    parties that are in the business of healthcare-related marketing
    calls.
    We will take up the challenges to those four aspects of
    the Commission’s 2015 ruling in the same order.
    11
    II.
    Under the Administrative Procedure Act, we assess
    whether the Commission’s challenged actions in its 2015
    order were “arbitrary, capricious, an abuse of discretion, or
    otherwise not in accordance with law.” 
    5 U.S.C. § 706
    (2)(A).
    We review the lawfulness of the Commission’s interpretations
    of the TCPA using the two-step Chevron framework. That
    inquiry calls for examining whether “Congress has directly
    spoken to the precise question at issue,” and, if not, whether
    “the agency’s answer is based on a permissible construction
    of the statute.” Chevron U.S.A. Inc. v. Nat’l Res. Def.
    Council, Inc., 
    467 U.S. 837
    , 842-43 (1984).
    To be lawful, the Commission’s challenged actions must
    also satisfy the Administrative Procedure Act’s requirement
    that they not be arbitrary or capricious. Arbitrary-and-
    capricious review includes assuring that the agency “engaged
    in reasoned decisionmaking.” Judulang v. Holder, 
    565 U.S. 42
    , 53 (2011). Review of agency action for arbitrariness and
    capriciousness sometimes entails essentially the same inquiry
    as review of an agency’s exercise of statutory interpretation
    under Chevron’s second step. See 
    id.
     at 52 n.7; Agape
    Church, Inc. v. FCC, 
    738 F.3d 397
    , 410 (D.C. Cir. 2013).
    Applying those standards to petitioners’ four sets of
    challenges to the Commission’s 2015 Declaratory Ruling, we
    set aside the Commission’s explanation of which devices
    qualify as an ATDS, as well as its understanding of when a
    caller violates the Act by calling a wireless number previously
    held by a consenting party but reassigned to a person who has
    not given consent. We sustain, however, the Commission’s
    ruling that a party can revoke consent through any reasonable
    means clearly expressing a desire to receive no further calls or
    12
    texts, and we also uphold the scope of the Commission’s
    exemption for time-sensitive, healthcare-related calls.
    A.
    We first consider the Commission’s effort to clarify
    which sorts of calling equipment qualify as an ATDS so as to
    fall subject to the general prohibition against making calls
    using such a device without consent. The statute defines an
    ATDS as “equipment which has the capacity—(A) to store or
    produce telephone numbers to be called, using a random or
    sequential number generator; and (B) to dial such numbers.”
    47 U.S.C § 227(a)(1). That definition naturally raises two
    questions: (i) when does a device have the “capacity” to
    perform the two enumerated functions; and (ii) what precisely
    are those functions? We conclude that the Commission’s
    approach to those two questions cannot be sustained, at least
    given the Commission’s unchallenged assumption that a call
    made with a device having the capacity to function as an
    autodialer can violate the statute even if autodialer features
    are not used to make the call.
    1.
    a. In addressing what it means for equipment to have the
    “capacity” to perform the autodialer functions enumerated in
    the statute, the Commission rejected the arguments of various
    parties that a device’s capacity must be measured solely by
    reference to its “present capacity” or its “current
    configuration” without any modification. 2015 Declaratory
    Ruling, 30 FCC Rcd. at 7974 ¶ 16. The Commission instead
    determined that the “capacity” of calling equipment “includes
    its potential functionalities” or “future possibility,” not just its
    “present ability.” Id. at 7974 ¶ 16; id. at 7975 ¶ 20.
    13
    The Commission reasoned that the “functional capacity
    of software-controlled equipment is designed to be flexible,
    both in terms of features that can be activated or de-activated
    and in terms of features that can be added to the equipment’s
    overall functionality through software changes or updates.”
    Id. at 7974 ¶ 16 n.63. And the Commission found support for
    its “potential functionalities” approach in dictionary
    definitions of the term “capacity,” one of which is “the
    potential or suitability for holding, storing, or
    accommodating.” Id. at 7975 ¶ 19 (quoting Capacity,
    Merriam-Webster Dictionary Online, https://www.merriam-
    webster.com/dictionary/capacity (as visited May 18, 2015)).
    In challenging the Commission’s approach, petitioners
    argue that the term “capacity” in the statutory definition of an
    ATDS can refer only to a device’s “present ability,” i.e., its
    current and unmodified state, not its “potential ability” taking
    into account possible upgrades or modifications. It is far from
    clear, though, that labels such as “present” ability versus
    “potential” ability should carry dispositive weight in assessing
    the meaning of the statutory term “capacity.” After all, even
    under the ostensibly narrower, “present ability” interpretation
    advanced by petitioners, a device that “presently” (and
    generally) operates as a traditional telephone would still be
    considered have the “capacity” to function as an ATDS if it
    could assume the requisite features merely upon touching a
    button on the equipment to switch it into autodialer mode.
    Virtually any understanding of “capacity” thus contemplates
    some future functioning state, along with some modifying act
    to bring that state about.
    Consequently, the question whether equipment has the
    “capacity” to perform the functions of an ATDS ultimately
    turns less on labels such as “present” and “potential” and
    more on considerations such as how much is required to
    14
    enable the device to function as an autodialer: does it require
    the simple flipping of a switch, or does it require essentially a
    top-to-bottom reconstruction of the equipment?              And
    depending on the answer, what kinds (and how broad a swath)
    of telephone equipment might then be deemed to qualify as an
    ATDS subject to the general bar against making any calls
    without prior express consent?
    b.    Here, the Commission adopted an expansive
    interpretation of “capacity” having the apparent effect of
    embracing any and all smartphones: the device routinely used
    by the vast majority of citizens to make calls and send
    messages (and for many people, the sole phone equipment
    they own). It is undisputed that essentially any smartphone,
    with the addition of software, can gain the statutorily
    enumerated features of an autodialer and thus function as an
    ATDS. The Commission in its ruling did not question the
    observation of a dissenting Commissioner that “[i]t’s trivial to
    download an app, update software, or write a few lines of
    code that would modify a phone to dial random or sequential
    numbers.” 2015 Declaratory Ruling, 30 FCC Rcd. at 8075
    (Comm’r Pai, dissenting). The Commission itself noted that
    “[d]ialing options” are now “available via smartphone apps”
    that enable “[c]alling and texting consumers en masse.” Id. at
    7970 ¶ 7.
    The Commission’s ruling concluded that app downloads
    and other software additions of that variety—and the
    enhanced functionality they bring about—are appropriately
    considered to be within a device’s “capacity.” The ruling
    states that equipment’s “functional capacity” includes
    “features that can be added . . . through software changes or
    updates.” Id. at 7974 ¶ 16 n.63. As a result, “a piece of
    equipment can possess the requisite ‘capacity’ to satisfy the
    statutory definition of an ‘autodialer’ even if, for example, it
    15
    requires the addition of software to actually perform the
    functions described in the definition.” Id. at 7975 ¶ 18. The
    Commission reinforced the point in an example set forth in its
    brief in this case: “If I ask whether the Firefox browser has
    the ‘capacity’ to play Flash videos, it would be natural for you
    to answer ‘Yes, if you download the Flash plug-in’—and it
    would be incorrect for you to answer ‘No.’” FCC Br. 29.
    If a device’s “capacity” includes functions that could be
    added through app downloads and software additions, and if
    smartphone apps can introduce ATDS functionality into the
    device, it follows that all smartphones, under the
    Commission’s approach, meet the statutory definition of an
    autodialer. The Commission’s ruling does not deny that
    conclusion.
    To the contrary, a number of parties specifically argued
    to the agency “that a broad interpretation of ‘capacity’ could
    potentially sweep in smartphones because they may have the
    capacity to store telephone numbers to be called and to dial
    such numbers through the use of an app or other software.”
    2015 Declaratory Ruling, 30 FCC Rcd. at 7976 ¶ 21. Rather
    than resist that contention, the Commission assumed its
    correctness, responding that, even if smartphones qualify as
    autodialers, it was unclear to the Commission that the “typical
    use of smartphones” would be “likely” to give rise to
    “unwanted calls” of a kind producing “legal action.” Id. at
    7977 ¶ 21. A dissenting Commissioner read that portion of
    the Commission’s order to “acknowledge[] that smartphones
    are swept in under its reading,” such that “each and every
    smartphone . . . is an automatic telephone dialing system.” Id.
    at 8075 & n.576 (Comm’r Pai, dissenting). The Commission
    did not disagree or suggest otherwise.
    16
    c. If every smartphone qualifies as an ATDS, the
    statute’s restrictions on autodialer calls assume an eye-
    popping sweep. Recall that the statute generally bars the use
    of an ATDS to make any call (or send any text message)
    without prior express consent, and tags each violation with a
    minimum $500 penalty in damages for each individual
    recipient of each prohibited call or message. The reach of the
    statute becomes especially pronounced upon recognizing that,
    under the Commission’s approach, an uninvited call or
    message from a smartphone violates the statute even if
    autodialer features were not used to make the call or send the
    message. Id. at 7976 ¶ 19 n.70. We explore that interpretive
    issue in greater depth below (infra § II.A.3); but for now, it
    suffices to appreciate the Commission’s understanding that, as
    long as equipment has the “capacity” to function as an
    autodialer—as is true of every smartphone under the agency’s
    view—any uninvited call or message from the device is a
    statutory violation.
    Imagine, for instance, that a person wishes to send an
    invitation for a social gathering to a person she recently met
    for the first time. If she lacks prior express consent to send
    the invitation, and if she obtains the acquaintance’s cell phone
    number from a mutual friend, she ostensibly commits a
    violation of federal law by calling or sending a text message
    from her smartphone to extend the invitation. See 2015
    Declaratory Ruling, 30 FCC Rcd. at 8076 (Comm’r Pai,
    dissenting). And if she sends a group message inviting ten
    people to the gathering, again without securing prior express
    consent from any of the recipients, she not only would have
    infringed the TCPA ten distinct times but would also face a
    minimum damages recovery against her of $5,000.
    Those sorts of anomalous outcomes are bottomed in an
    unreasonable, and impermissible, interpretation of the
    17
    statute’s reach. The TCPA cannot reasonably be read to
    render every smartphone an ATDS subject to the Act’s
    restrictions, such that every smartphone user violates federal
    law whenever she makes a call or sends a text message
    without advance consent.
    A “significant majority of American adults” owned a
    smartphone even by 2013. Riley v. California, 
    134 S. Ct. 2473
    , 2484 (2014). And as of the end of 2016, nearly 80% of
    American adults had become smartphone owners. See 10
    Facts About Smartphones as the iPhone Turns 10, Pew
    Research          Ctr.,        June         28,         2017,
    http://www.pewresearch.org/fact-tank/2017/06/28/10-facts-
    about-smartphones (last visited Dec. 18, 2017). That figure
    will only continue to grow, and increasingly, individuals own
    no phone equipment other than a smartphone. See id.;
    Wireless Substitution: Early Release of Estimates From the
    National Health Interview Survey, January–June 2017, Nat’l
    Ctr.     for    Health    Statistics    1     (Dec.    2017),
    https://www.cdc.gov/nchs/data/nhis/earlyrelease/wireless2017
    05.pdf.
    It is untenable to construe the term “capacity” in the
    statutory definition of an ATDS in a manner that brings
    within the definition’s fold the most ubiquitous type of phone
    equipment known, used countless times each day for routine
    communications by the vast majority of people in the country.
    It cannot be the case that every uninvited communication
    from a smartphone infringes federal law, and that nearly every
    American is a TCPA-violator-in-waiting, if not a violator-in-
    fact.
    In that regard, it is notable that Congress, in its findings
    setting forth the basis for the statute, found that some “30,000
    businesses actively telemarket goods and services to business
    18
    and residential customers” and “[m]ore than 300,000
    solicitors call more than 18,000,000 Americans every day.”
    
    47 U.S.C. § 227
     note, Pub. L. No. 102-243, § 2(2)-(3), 
    105 Stat. 2394
    , 2394. Those sorts of predicate congressional
    findings can shed substantial light on the intended reach of a
    statute. See Sutton v. United Airlines, Inc., 
    527 U.S. 471
    ,
    484-87 (1999).
    Of course, there is no expectation that a statute’s reach
    necessarily will precisely match Congress’s findings about a
    problem it aims to address, and Congress might well fashion a
    statute’s operative provisions with built-in flexibility to
    accommodate expansion of the concerns animating the
    legislation over time. But a several-fold gulf between
    congressional findings and a statute’s suggested reach can call
    into doubt the permissibility of the interpretation in
    consideration.
    That is what happened in Sutton. There, the Supreme
    Court rejected an interpretation of the term “disability” in the
    Americans with Disabilities Act that would have treated some
    160 million persons as disabled in the face of congressional
    findings contemplating the population of disabled persons as
    numbering only 43 million. See id.; 
    id. at 494-95
     (Ginsburg,
    J., concurring).    (After Sutton, Congress amended the
    statutory findings and the statute to allow for an expansive
    application. See ADA Amendments Act of 2008, Pub. L. No.
    110-325, § 2, 
    122 Stat. 3553
    , 3554.)
    Here, as in Sutton, the Commission’s expansive
    understanding of “capacity” in the TCPA is incompatible with
    a statute grounded in concerns about hundreds of thousands of
    “solicitors” making “telemarketing” calls on behalf of tens of
    thousands of “businesses.” The Commission’s interpretation
    would extend a law originally aimed to deal with hundreds of
    19
    thousands of telemarketers into one constraining hundreds of
    millions of everyday callers.
    The Commission’s capacious understanding of a device’s
    “capacity” lies considerably beyond the agency’s zone of
    delegated authority for purposes of the Chevron framework.
    As we have explained, “even if the [statute] does not
    foreclose the Commission’s interpretation, the interpretation
    [can] fall[] outside the bounds of reasonableness” at
    Chevron’s second step. Goldstein v. SEC, 
    451 F.3d 873
    , 880-
    81 (D.C. Cir. 2006). That is because an “agency[’s]
    construction of a statute cannot survive judicial review if a
    contested regulation reflects an action that exceeds the
    agency’s authority.” 
    Id.
     (quoting Aid Ass’n for Lutherans v.
    United States Postal Serv., 
    321 F.3d 1166
    , 1174 (D.C. Cir.
    2003)).
    In Aid Ass’n, for example, we examined Postal Service
    regulations that excluded nonprofit organizations’ use of
    certain reduced postage rates. We found the regulations to be
    incompatible with congressional intent. The regulations, we
    said, “constitute an impermissible construction of the statute
    under Chevron Step Two because the interpretation is utterly
    unreasonable in the breadth of its regulatory exclusion.” 
    321 F.3d at 1178
    .
    In this case, similarly, the Commission’s interpretation of
    the term “capacity” in the statutory definition of an ATDS is
    “utterly unreasonable in the breadth of its regulatory
    [in]clusion.” 
    Id.
     Nothing in the TCPA countenances
    concluding that Congress could have contemplated the
    applicability of the statute’s restrictions to the most
    commonplace phone device used every day by the
    overwhelming majority of Americans.
    20
    The Commission suggested in its ruling that, unless
    “capacity” reached so broadly, “little or no modern dialing
    equipment would fit the statutory definition.”          2015
    Declaratory Ruling, 30 FCC Rcd. at 7976 ¶ 20. But Congress
    need not be presumed to have intended the term “automatic
    telephone dialing system” to maintain its applicability to
    modern phone equipment in perpetuity, regardless of
    technological advances that may render the term increasingly
    inapplicable over time. After all, the statute also generally
    prohibits nonconsensual calls to numbers associated with a
    “paging service” or “specialized mobile radio service,” 
    47 U.S.C. § 227
    (b)(1)(A)(iii), yet those terms have largely
    ceased to have practical significance.
    In any event, the Commission retains a measure of
    authority under the TCPA to fashion exemptions to the
    restrictions on use of autodialers to call wireless numbers. 
    Id.
    § 227(b)(2)(C). The agency presumably could, if needed,
    fashion exemptions preventing a result under which every
    uninvited call or message from a standard smartphone would
    violate the statute.
    d. In its briefing before our court, the Commission now
    submits that its order in fact did not reach a definitive
    resolution on whether smartphones qualify as autodialers.
    As we have explained, however, a straightforward reading of
    the Commission’s ruling invites the conclusion that all
    smartphones are autodialers: the ruling explained that a
    number of parties specifically raised the issue; and it
    responded, not by disputing the parties’ concerns that
    smartphones would be covered by the statutory definition
    under the agency’s approach, but instead by accepting that
    conclusion and then questioning whether uninvited calls in
    fact would be made and lawsuits in fact would be brought.
    21
    It is highly difficult to read the Commission’s ruling to
    leave uncertain whether the statutory definition applies to
    smartphones. And any uncertainty on that score would have
    left affected parties without concrete guidance even though
    several of them specifically raised the issue with the agency,
    and even though the issue carries significant implications—
    including the possibility of committing federal law violations
    and incurring substantial liability in damages—for
    smartphone owners.
    At any rate, even assuming the Commission’s ruling
    could be conceived to leave room for concluding that
    smartphones do not qualify as autodialers, that result itself
    would be unreasonable and impermissible.                 The
    Commission’s order, in that event, would not constitute
    reasoned decisionmaking and thus would not satisfy APA
    arbitrary-and-capricious review. See United States Postal
    Serv. v. Postal Regulatory Comm’n, 
    785 F.3d 740
    , 754 (D.C.
    Cir. 2015).
    Administrative action is “arbitrary and capricious [if] it
    fails to articulate a comprehensible standard” for assessing the
    applicability of a statutory category. 
    Id. at 753
    . If a
    “purported standard is indiscriminate and offers no
    meaningful guidance” to affected parties, it will fail “the
    requirement of reasoned decisionmaking.” 
    Id. at 754
    . That
    will be the case if an agency cannot satisfactorily explain why
    a challenged standard embraces one potential application but
    leaves out another, seemingly similar one. See 
    id. at 754-55
    .
    That would be precisely the situation here if, as the
    Commission now contends in its briefing before us, its order
    in fact left open the possibility that smartphones fail to meet
    the statutory definition of an ATDS. In the same briefing, the
    Commission, as noted, simultaneously maintained that the
    22
    Firefox browser has the “capacity” to play Flash videos
    because the Flash plug-in can be downloaded. Precisely the
    same logic seemingly should compel concluding that
    smartphones have the “capacity” to function as autodialers
    because apps carrying the requisite features can be
    downloaded.       If the Commission believes smartphones
    nonetheless do not meet the definition of an autodialer, there
    is no explanation of “this differential treatment of seemingly
    like cases.” 
    Id. at 755
     (internal quotation marks omitted).
    The Commission did say in its order that “there must be
    more than a theoretical potential that the equipment could be
    modified to satisfy the ‘autodialer’ definition.”        2015
    Declaratory Ruling, 30 FCC Rcd. at 7975 ¶ 18. But that
    ostensible limitation affords no ground for distinguishing
    between a smartphone and the Firefox browser. In light of the
    ease of downloading an app to a smartphone, there is no
    evident basis for concluding that the Firefox browser has
    more than a mere “theoretical potential” to play Flash videos
    by downloading a plug-in, but a smartphone nonetheless has
    only a “theoretical potential” to function as an autodialer by
    downloading an app.
    The point is fortified by the sole example of a mere
    “theoretical potential” set forth by the Commission in its
    order. That example involves a traditional rotary-dial phone
    (which by now is approaching obsolescence):                      the
    Commission observed that “it might be theoretically possible
    to modify a rotary-dial telephone to such an extreme that it
    would satisfy the definition of ‘autodialer,’ but such a
    possibility is too attenuated . . . to find that a rotary-dial phone
    has the requisite ‘capacity’ and therefore is an autodialer.” 
    Id.
    A rotary phone has no relevant similarity to a smartphone. To
    the contrary, whereas a smartphone and the Firefox browser
    substantially resemble one another in their amenability to an
    23
    upgrade via the addition of software, they substantially differ
    in that regard from a rotary-dial phone, which has no such
    capability.
    In the end, then, the Commission’s order cannot
    reasonably be understood to support the conclusion that
    smartphones fall outside the TCPA’s autodialer definition:
    any such reading would compel concluding that the agency’s
    ruling fails arbitrary-and-capricious review.      The more
    straightforward understanding of the Commission’s ruling is
    that all smartphones qualify as autodialers because they have
    the inherent “capacity” to gain ATDS functionality by
    downloading an app. That interpretation of the statute, for all
    the reasons explained, is an unreasonably, and impermissibly,
    expansive one.
    2.
    Recall that the statutory definition of an ATDS raises two
    sets of questions: (i) when does a device have the “capacity”
    to perform the functions of an autodialer enumerated by the
    statute?; and (ii) what precisely is the content of those
    functions?      The impermissibility of the Commission’s
    interpretation of the term “capacity” in the autodialer
    definition is compounded by inadequacies in the agency’s
    explanation of the requisite features. Having addressed the
    first issue, we now turn to the second one.
    a. As a threshold matter, the Commission maintains that
    the court lacks jurisdiction to entertain petitioners’ challenge
    concerning the functions a device must be able to perform.
    The agency reasons that the issue was resolved in prior
    agency orders—specifically, declaratory rulings in 2003 and
    2008 concluding that the statutory definition of an ATDS
    includes “predictive dialers,” dialing equipment that can make
    24
    use of algorithms to “assist[] telemarketers in predicting when
    a sales agent will be available to take calls.” 2015
    Declaratory Ruling, 30 FCC Rcd. at 7972 ¶ 10 n.39; see also
    In re Rules and Regulations Implementing the Telephone
    Consumer Protection Act of 1991 (2008 Declaratory Ruling),
    23 FCC Rcd. 559 (2008); 2003 Order, 18 FCC Rcd. 14,014.
    According to the Commission, because there was no timely
    appeal from those previous orders, it is too late now to raise a
    challenge by seeking review of a more recent declaratory
    ruling that essentially ratifies the previous ones. We disagree.
    While the Commission’s latest ruling purports to reaffirm
    the prior orders, that does not shield the agency’s pertinent
    pronouncements from review. The agency’s prior rulings left
    significant uncertainty about the precise functions an
    autodialer must have the capacity to perform. Petitioners
    covered their bases by filing petitions for both a declaratory
    ruling and a rulemaking concerning that issue and related
    ones. See, e.g., Prof’l Ass’n for Customer Engagement, Inc.
    Pet. 3-4; ACA Int’l Pet. 6; GroupMe, Inc. Pet. 3; Glide Talk,
    Ltd. Pet. 13.      In response, the Commission issued a
    declaratory ruling that purported to “provid[e] clarification on
    the definition of ‘autodialer,’” and denied the petitions for
    rulemaking on the issue. 2015 Declaratory Ruling, 30 FCC
    Rcd. at 8039 ¶ 165 & n.552. The ruling is thus reviewable on
    both grounds. See 
    5 U.S.C. § 554
    (e); Biggerstaff v. FCC, 
    511 F.3d 178
    , 184-85 (D.C. Cir. 2007).
    b. The statutory definition says that a device constitutes
    an ATDS if it has the capacity to perform both of two
    enumerated functions:     “to store or produce telephone
    numbers to be called, using a random or sequential number
    generator”; and “to dial such numbers.”           
    47 U.S.C. § 227
    (a)(1)(A)-(B). The role of the phrase, “using a random
    or sequential number generator,” has generated substantial
    25
    questions over the years. The Commission has sought to
    address those questions in previous orders and did so again in
    the 2015 Declaratory Ruling we consider here.
    The Commission’s most recent effort falls short of
    reasoned decisionmaking in “offer[ing] no meaningful
    guidance” to affected parties in material respects on whether
    their equipment is subject to the statute’s autodialer
    restrictions. Postal Regulatory Comm’n, 785 F.3d at 754. A
    basic question raised by the statutory definition is whether a
    device must itself have the ability to generate random or
    sequential telephone numbers to be dialed. Or is it enough if
    the device can call from a database of telephone numbers
    generated elsewhere? The Commission’s ruling appears to be
    of two minds on the issue.
    In certain respects, the order conveys that equipment
    needs to have the ability to generate random or sequential
    numbers that it can then dial. The order twice states that, to
    “meet[] the TCPA’s definition of ‘autodialer,’” the equipment
    in question must have the capacity to “dial random or
    sequential numbers.” 2015 Declaratory Ruling, 30 FCC Rcd.
    at 7972 ¶ 10; see also id. at 7974 ¶ 15. And it is clear from
    context that the order treats the ability to “dial random or
    sequential numbers” as the ability to generate and then dial
    “random or sequential numbers.”
    To see why, it is helpful to understand that the ruling
    distinguishes between use of equipment to “dial random or
    sequential numbers” and use of equipment to “call[] a set list
    of consumers.” Id. at 7972 ¶ 10. Anytime phone numbers are
    dialed from a set list, the database of numbers must be called
    in some order—either in a random or some other sequence.
    As a result, the ruling’s reference to “dialing random or
    sequential numbers” cannot simply mean dialing from a set
    26
    list of numbers in random or other sequential order: if that
    were so, there would be no difference between “dialing
    random or sequential numbers” and “dialing a set list of
    numbers,” even though the ruling draws a divide between the
    two. See id. at 7973 ¶¶ 13, 14. It follows that the ruling’s
    reference to “dialing random or sequential numbers” means
    generating those numbers and then dialing them.
    The Commission’s prior declaratory rulings reinforce that
    understanding. In its 2003 ruling addressing predictive
    dialers, the Commission observed that, “[i]n the past,
    telemarketers may have used dialing equipment to create and
    dial 10-digit telephone numbers arbitrarily.” 2003 Order, 18
    FCC Rcd. at 14,092 ¶ 132 (emphasis added). But the industry
    had “progressed to the point where” it had become “far more
    cost effective” instead to “us[e] lists of numbers.” Id. Again,
    the Commission suggested it saw a difference between calling
    from a list of numbers, on one hand, and “creating and
    dialing” a random or arbitrary list of numbers, on the other
    hand. Or as the Commission has elsewhere said, numbers that
    are “randomly or sequentially generated” differ from numbers
    that “come from a calling list.” In re Implementation of the
    Middle Class Tax Relief and Job Creation Act of 2012, 27
    FCC Rcd. 13,615, 13,629 ¶ 29 (2012) (quoted in 2015
    Declaratory Ruling, 30 FCC Rcd. at 8077 (Comm’r Pai,
    dissenting)).
    While the 2015 ruling indicates in certain places that a
    device must be able to generate and dial random or sequential
    numbers to meet the TCPA’s definition of an autodialer, it
    also suggests a competing view: that equipment can meet the
    statutory definition even if it lacks that capacity. The
    Commission reaffirmed its 2003 ruling insofar as that order
    had found predictive dialers to qualify as ATDSs. 2015
    Declaratory Ruling, 30 FCC Rcd. at 7972-73 ¶¶ 12-14. And
    27
    in the 2003 order, the Commission had made clear that, while
    some predictive dialers cannot be programmed to generate
    random or sequential phone numbers, they still satisfy the
    statutory definition of an ATDS. 2003 Order, 18 FCC Rcd. at
    14,091 ¶ 131 n.432; id. at 14,093 ¶ 133. By reaffirming that
    conclusion in its 2015 ruling, the Commission supported the
    notion that a device can be considered an autodialer even if it
    has no capacity itself to generate random or sequential
    numbers (and instead can only dial from an externally
    supplied set of numbers). The 2015 ruling correspondingly
    expresses that “predictive dialers” can differ from other
    “dialers that utilize random or sequential numbers instead of a
    list of numbers.” 2015 Declaratory Ruling, 30 FCC Rcd. at
    7973 ¶ 14.
    So which is it: does a device qualify as an ATDS only if
    it can generate random or sequential numbers to be dialed, or
    can it so qualify even if it lacks that capacity? The 2015
    ruling, while speaking to the question in several ways, gives
    no clear answer (and in fact seems to give both answers). It
    might be permissible for the Commission to adopt either
    interpretation. But the Commission cannot, consistent with
    reasoned decisionmaking, espouse both competing
    interpretations in the same order.
    The choice between the interpretations is not without
    practical significance. Petitioners and various amici describe
    calling equipment that they wish to use to call set lists of
    cellular numbers without any generation of random or
    sequential numbers. See ACA Int’l Reply Br. 21; Am.
    Bankers Ass’n Amicus Br. 29-30. And at least some
    predictive dialers, as explained, have no capacity to generate
    random or sequential numbers.
    28
    The uncertainty in the 2015 ruling, moreover, does not
    stop with the question of whether a device must be able to
    generate random or sequential numbers to meet the statutory
    definition. The ruling is also unclear about whether certain
    other referenced capabilities are necessary for a dialer to
    qualify as an ATDS.
    For instance, the ruling states that the “basic function” of
    an autodialer is the ability to “dial numbers without human
    intervention.” 2015 Declaratory Ruling, 30 FCC Rcd. at 7973
    ¶ 14; id. at 7975 ¶ 17. Prior orders had said the same. 2003
    Order, 18 FCC Rcd. at 14,092 ¶ 132; 2008 Declaratory
    Ruling, 23 FCC Rcd. at 566 ¶ 13. That makes sense given
    that “auto” in autodialer—or, equivalently, “automatic” in
    “automatic telephone dialing system,” 
    47 U.S.C. § 227
    (a)(1)—would seem to envision non-manual dialing of
    telephone numbers.
    But the Commission nevertheless declined a request to
    “clarify[] that a dialer is not an autodialer unless it has the
    capacity to dial numbers without human intervention.” 2015
    Declaratory Ruling, 30 FCC Rcd. at 7976 ¶ 20. According to
    the Commission, then, the “basic function” of an autodialer is
    to dial numbers without human intervention, but a device
    might still qualify as an autodialer even if it cannot dial
    numbers without human intervention. Those side-by-side
    propositions are difficult to square.
    The Commission further said that another “basic
    function[]” of an ATDS is to “dial thousands of numbers in a
    short period of time.” 
    Id.
     at 7975 ¶ 17. But the ruling imparts
    no additional guidance concerning whether that is a necessary
    condition, a sufficient condition, a relevant condition even if
    neither necessary nor sufficient, or something else. Nor does
    it indicate what would qualify as a “short period of time.”
    29
    Again, affected parties are left in a significant fog of
    uncertainty about how to determine if a device is an ATDS so
    as to bring into play the restrictions on unconsented calls.
    In short, the Commission’s ruling, in describing the
    functions a device must perform to qualify as an autodialer,
    fails to satisfy the requirement of reasoned decisionmaking.
    The order’s lack of clarity about which functions qualify a
    device as an autodialer compounds the unreasonableness of
    the Commission’s expansive understanding of when a device
    has the “capacity” to perform the necessary functions. We
    must therefore set aside the Commission’s treatment of those
    matters.
    3.
    We briefly note an additional statutory provision
    affecting the scope of the TCPA’s restrictions on autodialer
    calls to cell numbers—a provision we ultimately have no
    occasion to examine because of the way the case has been
    presented to us. Two TCPA provisions work together to
    establish the reach of the general prohibition against making
    autodialer calls without prior consent. The first provision, as
    we have seen, defines the equipment—viz., “automatic
    telephone dialing system”—subject to the statutory
    prohibition. 
    47 U.S.C. § 227
    (a)(1). The second provision
    then incorporates that definition in setting out the scope of the
    prohibition: “It shall be unlawful for any person . . . to make
    any call (other than a call made for emergency purposes or
    made with the prior express consent of the called party) using
    any automatic telephone dialing system . . . to any telephone
    number assigned to a . . . cellular telephone service[.]” 
    Id.
    § 227(b)(1)(A)(iii) (emphases added).
    30
    Petitioners have confined their challenge to the
    Commission’s understanding of the first of those provisions,
    the statutory definition of an autodialer, and our analysis has
    been focused on that issue. Petitioners have raised no
    challenge to the Commission’s understanding of the second
    provision—i.e., to the agency’s interpretation of what it
    means to “make any call using any” ATDS. In particular, in
    the case of a device having the “capacity” both to perform the
    autodialer functions set out in the statutory definition and to
    perform as a traditional phone, does the bar against “making
    any call using” an ATDS apply only to calls made using the
    equipment’s ATDS functionality? Or does the bar apply to all
    calls made with a device having that “capacity,” even ones
    made without any use of the equipment’s autodialer
    capabilities? Or does the bar apply to calls made using
    certain autodialer functions, even if not all of them?
    The Commission’s ruling endorsed a broad
    understanding under which the statute prohibits any calls
    made from a device with the capacity to function as an
    autodialer, regardless of whether autodialer features are used
    to make a call. 2015 Declaratory Ruling, 30 FCC Rcd. at
    7975 ¶ 19 n.70. A dissenting commissioner, by contrast, read
    the pertinent statutory phrase, “make any call,” to mean “that
    the equipment must, in fact, be used as an autodialer to make
    the calls” before a TCPA violation can be found. Id. at 8088
    (Comm’r O’Rielly, dissenting in part and approving in part).
    The dissenting commissioner’s interpretation would
    substantially diminish the practical significance of the
    Commission’s expansive understanding of “capacity” in the
    autodialer definition. Even if the definition encompasses any
    device capable of gaining autodialer functionality through the
    downloading of software, the mere possibility of adding those
    features would not matter unless they were downloaded and
    31
    used to make calls. Under the dissent’s understanding of the
    phrase, “make any call,” then, everyday calls made with a
    smartphone would not infringe the statute: the fact that a
    smartphone could be configured to function as an autodialer
    would not matter unless the relevant software in fact were
    loaded onto the phone and were used to initiate calls or send
    messages.
    Petitioners, however, raise no challenge to the
    Commission’s understanding of the statutory words, “make
    any call using” an ATDS, and the parties therefore have not
    presented arguments on the issue in their briefing before us.
    Our consistent practice in such a situation is to decline to
    address (much less resolve) the issue. See, e.g., U.S. Telecom
    Ass’n v. FCC, 
    825 F.3d 674
    , 697 (D.C. Cir. 2016). We “sit to
    resolve only legal questions presented and argued by the
    parties.” 
    Id.
     (internal quotation marks omitted). We
    nonetheless note the issue in light of its potential interplay
    with the distinct challenges petitioners do raise. The agency
    could choose to revisit the issue in a future rulemaking or
    declaratory order, and a party might then raise the issue on
    judicial review.
    B.
    We now turn to the Commission’s treatment of
    circumstances in which a consenting party’s cell number has
    been reassigned to another person. While there is no
    consensus about the exact numbers of reassignments, there is
    no dispute that millions of wireless numbers are reassigned
    each year. In the event of a reassignment, the caller might
    initiate a phone call (or send a text message) based on a
    mistaken belief that the owner of the receiving number has
    given consent, when in fact the number has been reassigned to
    someone else from whom consent has not been obtained.
    32
    Does a call or message in that situation violate the
    statutory bar against making autodialer calls without prior
    consent? The Commission’s answer is yes, apart from a one-
    call, post-reassignment safe harbor. We set aside the
    Commission’s interpretation on the ground that the one-call
    safe harbor is arbitrary and capricious.
    1.
    The pertinent statutory language generally renders it
    unlawful “to make any call (other than a call made for
    emergency purposes or made with the prior express consent
    of the called party) using any automatic telephone dialing
    equipment or prerecorded voice.” 
    47 U.S.C. § 227
    (b)(1)(A)
    (emphasis added). The Commission, in its ruling, initially
    addressed who is properly considered the “called party” when
    a consenting party’s number is reassigned to another person:
    does “called party” refer to the person the caller expected to
    reach (whose consent had previously been obtained), or does
    it refer to the person actually reached, the wireless number’s
    present-day subscriber after reassignment (whose consent has
    not been obtained)?
    The Commission adopted the latter interpretation. 30
    FCC Rcd. at 7999-8001 ¶¶ 72-73. The result is that the
    reassignment of a wireless number extinguishes any consent
    given by the number’s previous holder and exposes the caller
    to liability for reaching a party who has not given consent.
    An alternative approach, the Commission reasoned, would
    “effectively require consumers to opt out of such calls when
    the TCPA clearly requires the opposite—that consumers opt
    in before they can be contacted.” 
    Id.
     at 8004 ¶ 80.
    The agency also refused to “place any affirmative
    obligation” on new subscribers to inform callers that a
    33
    wireless number now belongs to someone else. 
    Id.
     at 8011
    ¶ 95. The ruling thus expressly contemplates that a new
    subscriber could “purposefully and unreasonably” refrain
    from informing a good-faith caller about a number’s
    reassignment “in order to accrue statutory penalties.” 
    Id.
    (formatting modified). In that regard, the Commission
    described a reported case in which the new, post-reassignment
    subscriber waited to initiate a lawsuit until after having
    received almost 900 text alerts that were intended for the
    previous subscriber. 
    Id.
     at 8011 ¶ 94 & n.324.
    The Commission acknowledged that even the most
    careful caller, after employing all reasonably available tools
    to learn about reassignments, “may nevertheless not learn of
    reassignment before placing a call to a new subscriber.” 
    Id.
     at
    8009 ¶ 88. The Commission observed that it nonetheless
    “could have interpreted the TCPA to impose a traditional
    strict liability standard on the caller: i.e., a ‘zero call’
    approach under which no allowance would have been given
    for the robocaller to learn of the reassignment.” 
    Id.
     at 8009
    ¶ 90 n.312. But the Commission declined to interpret the
    statute “to require a result that severe.” 
    Id.
     Rather, the
    Commission read the statute to “anticipate[] the caller’s
    ability to rely on prior express consent,” which the
    Commission interpreted “to mean reasonable reliance.” 
    Id.
    (internal quotation marks omitted).
    The Commission effectuated its “reasonable reliance”
    approach by enabling a caller who lacks knowledge of a
    reassignment “to avoid liability for the first call to a wireless
    number following reassignment.” 
    Id.
     at 8009 ¶ 89. For that
    first call, the caller can continue to rely on the consent given
    by the “previous subscriber.” 
    Id.
     at 8003 ¶ 78. The
    Commission did “not presume that a single call to a
    reassigned number will always be sufficient for callers to gain
    34
    actual knowledge of the reassignment.” 
    Id.
     at 8009 ¶ 90
    n.312. But it believed that “[o]ne call represents an
    appropriate balance between a caller’s opportunity to learn of
    the reassignment and the privacy interests of the new
    subscriber.” 
    Id.
     at 8009 ¶ 90.
    2.
    In challenging the Commission’s resolution, petitioners
    first contend that the statutory reference to the consent of the
    “called party” refers to the expected recipient of a call or
    message, not the actual recipient. When a wireless number is
    reassigned without the caller’s awareness, petitioners’
    interpretation would mean that a caller would avoid liability
    for a post-reassignment call because the “called party”—the
    former owner of the number—had given consent. In
    petitioners’ view, the Commission’s contrary interpretation of
    “called party” to refer to the new (post-reassignment)
    subscriber is foreclosed by the statute. We disagree.
    Another court of appeals has examined the meaning of
    the term “called party” in the same statutory provision, 
    47 U.S.C. § 227
    (b)(1)(A), and in the same situation of a
    reassigned wireless number formerly belonging to a
    consenting party. Soppet v. Enhanced Recovery Co., 
    679 F.3d 637
     (7th Cir. 2012). The Seventh Circuit explained that the
    phrase “called party” appears throughout the broader statutory
    section, 
    47 U.S.C. § 227
    , a total of seven times. 
    679 F.3d at 640
    . Four of those instances “unmistakably denote the
    current subscriber,” not the previous, pre-reassignment
    subscriber. 
    Id.
     Of the three remaining instances, “one
    denotes whoever answers the call (usually the [current]
    subscriber),” and the other two are unclear. 
    Id.
     By contrast,
    the court observed, the “phrase ‘intended recipient’ does not
    appear anywhere in § 227, so what justification could there be
    35
    for equating ‘called party’ with ‘intended recipient of the
    call’?” Id. For those and other reasons, the court concluded
    “that ‘called party’ in § 227(b)(1) means the person
    subscribing to the called number at the time the call is made,”
    not the previous subscriber who had given consent. Id. at
    643; see also Osorio v. State Farm Bank, F.S.B., 
    746 F.3d 1242
    , 1250-52 (11th Cir. 2014).
    We find the Seventh Circuit’s analysis persuasive insofar as
    it supports concluding that the Commission was not
    compelled to interpret “called party” in § 227(b)(1)(A) to
    mean the “intended recipient” rather than the current
    subscriber. The Commission thus could permissibly interpret
    “called party” in that provision to refer to the current
    subscriber.
    3.
    Petitioners next argue that the Commission’s one-call
    safe harbor is arbitrary. On this score, we agree with
    petitioners.
    When a caller is unaware that a consenting party’s
    wireless number has been reassigned, the Commission chose
    to allow the caller to make one (and only one) post-
    reassignment call without incurring liability. For that one
    call, the Commission understood the statutory term “prior
    express consent” to refer to the consent given by the previous
    subscriber. 30 FCC Rcd. at 8001 ¶ 73 & n.265; id. at 8003
    ¶ 78.
    The Commission allowed for that one liability-free call,
    rather than impose “a traditional strict liability standard,”
    because it interpreted a caller’s ability under the statute to rely
    on a recipient’s “prior express consent” to “mean reasonable
    36
    reliance.” Id. at 8009 ¶ 90 n.312. And when a caller has no
    knowledge      of    a   reassignment,     the  Commission
    understandably viewed the caller’s continued reliance on the
    prior subscriber’s consent to be “reasonable.”
    Elsewhere in the Declaratory Ruling, the Commission
    echoed the same “reasonable reliance” understanding of the
    statute’s approval of calls based on “prior express consent.”
    The ruling accepts that a caller can rely on consent given by a
    wireless number’s “customary user” (“such as a close relative
    on a subscriber’s family calling plan”), rather than by the
    subscriber herself. Id. at 8001 ¶ 75. That is because the
    “caller in this situation cannot reasonably be expected to
    divine that the consenting person is not the subscriber.” Id. at
    8001-02 ¶ 75. The Commission reiterated in that regard that,
    in “construing the term ‘prior express consent’ in section
    227(b)(1)(A), we consider the caller’s reasonableness in
    relying on consent.” Id. at 8001 ¶ 75.
    The Commission thus consistently adopted a “reasonable
    reliance” approach when interpreting the TCPA’s approval of
    calls based on “prior express consent,” including as the
    justification for allowing a one-call safe harbor when a
    consenting party’s number is reassigned. The Commission,
    though, gave no explanation of why reasonable-reliance
    considerations would support limiting the safe harbor to just
    one call or message. That is, why does a caller’s reasonable
    reliance on a previous subscriber’s consent necessarily cease
    to be reasonable once there has been a single, post-
    reassignment call? The first call or text message, after all,
    might give the caller no indication whatsoever of a possible
    reassignment (if, for instance, there is no response to a text
    message, as would often be the case with or without a
    reassignment).
    37
    The Commission outlined a number of measures callers
    could undertake “that, over time, may permit them to learn of
    reassigned numbers.” Id. at 8007 ¶ 86. But the Commission
    acknowledged that callers “may nevertheless not learn of
    reassignment before placing a call to a new subscriber,” and
    that the first post-reassignment call likewise might give no
    reason to suspect a reassignment. Id. at 8009 ¶¶ 88, 90 n.312.
    In that event, a caller’s reasonable reliance on the previous
    subscriber’s consent would be just as reasonable for a second
    call.
    To be sure, the Commission stated that it found “no basis
    in the statute or the record before [it] to conclude that callers
    can reasonably rely on prior express consent beyond one call
    to reassigned numbers.” Id. at 8009-10 ¶ 90 n.312. But the
    Commission did not elaborate on—or otherwise support—its
    conclusory observation to that effect. And the statement is
    hard to square with the Commission’s concession that the first
    call may give no notice of a reassignment, or with the
    Commission’s disavowal of any expectation that a caller
    should “divine from the called consumer’s mere silence the
    current status of a telephone number.” Id. (brackets omitted).
    In that light, no cognizable conception of “reasonable
    reliance” supports the Commission’s blanket, one-call-only
    allowance.
    At times, the Commission indicated that its one-call safe
    harbor intends to give callers additional “opportunity” to find
    out about a possible reassignment. E.g., id. at 8009 ¶ 89; id.
    at 8010 ¶ 91. There is no indication, though, that the interest
    in giving callers such an opportunity is independent of the
    interest in giving effect to a caller’s reasonable reliance.
    After all, a caller also has an opportunity to learn of a
    reassignment before the first call. The reason to allow even
    one, liability-free, post-reassignment call—the reason the
    38
    Commission cared about affording an opportunity to learn
    about reassignment at all—is in order to give effect to a
    caller’s reasonable reliance on the previous subscriber’s
    consent.
    Indeed, the Commission’s one-call safe harbor applies
    “over an unlimited period of time.” Id. at 8000 ¶ 72 n.257.
    If the goal were simply to provide an expanded opportunity to
    learn about a reassignment, the Commission presumably
    would have allowed for a given period of time. It declined to
    do so, id. at 8009 ¶ 89, opting instead to permit a single call
    regardless of whether it occurs within minutes or months of a
    reassignment.
    For substantially the same reasons, the Commission’s
    one-call-only approach cannot be salvaged by its suggestion
    that callers rather than new subscribers should bear the risk
    when calls are made (or messages are sent) to a reassigned
    number. Id. at 8009-10 ¶ 90 n.312. That consideration would
    equally support a zero-call, strict-liability rule. But the
    Commission specifically declined to adopt “a result that
    severe.” Id. Having instead embraced an interpretation of the
    statutory phrase “prior express consent” grounded in
    conceptions of reasonable reliance, the Commission needed to
    give some reasoned (and reasonable) explanation of why its
    safe harbor stopped at the seemingly arbitrary point of a
    single call or message. The Commission did not do so.
    The Seventh Circuit’s decision in Soppet, discussed
    earlier, is not to the contrary. There, the court assumed that
    “any consent previously given . . . lapses when [a] [c]ell
    [n]umber is reassigned.” 
    679 F.3d at 641
    . The court, though,
    did not have before it an agency interpretation under which
    the previous subscriber’s consent does not lapse with
    reassignment: the premise of the Commission’s one-call safe
    39
    harbor is that a caller can continue to rely on the previous
    subscriber’s consent. The question we face is, why should
    that necessarily stop with a single call? Soppet does not speak
    to that question, and so does not cast doubt on our conclusion
    that the Commission failed to give it a satisfactory answer.
    Finally, the Commission’s failure in that regard requires
    setting aside not only its allowance of a one-call safe harbor,
    but also its treatment of reassigned numbers more generally.
    When we invalidate a specific aspect of an agency’s action,
    we leave related components of the agency’s action standing
    only if “we can say without any ‘substantial doubt’ that the
    agency would have adopted the severed portion on its own.”
    Am. Petroleum Inst. v. EPA, 
    862 F.3d 50
    , 71 (D.C. Cir. 2017)
    (per curiam) (internal quotation marks omitted).
    Here, we have no such assurance. If we were to excise
    the Commission’s one-call safe harbor alone, that would leave
    in place the Commission’s interpretation that “called party”
    refers to the new subscriber. And that in turn would mean
    that a caller is strictly liable for all calls made to the
    reassigned number, even if she has no knowledge of the
    reassignment.
    We cannot be certain that the agency would have adopted
    that rule in the first instance. Significantly, the Commission
    said that it “could have interpreted the TCPA to impose a
    traditional strict liability standard,” i.e., “a ‘zero call’
    approach.” 30 FCC Rcd. at 8009 ¶ 90 n.312. But the agency
    declined to “require a result that severe,” opting instead for a
    one-call safe harbor. 
    Id.
     We cannot say without any
    substantial doubt that the agency would have embraced the
    “severe” implications of a pure, strict-liability regime even in
    the absence of any safe harbor. As a result, we must set aside
    40
    the Commission’s treatment of reassigned numbers as a
    whole.
    Notably, the Commission is already on its way to
    designing a regime to avoid the problems of the 2015 ruling’s
    one-call safe harbor. The Commission recently sought
    comment on potential methods for “requir[ing] service
    providers to report information about number reassignments
    for the purposes of reducing unwanted robocalls.” In re
    Advanced Methods to Target and Eliminate Unlawful
    Robocalls, Second Notice of Inquiry, 32 FCC Rcd. 6007,
    6010 ¶ 9 (2017). Most of its proposals envision creating a
    comprehensive repository of information about reassigned
    wireless numbers. See 
    id.
     at 6012-13 ¶¶ 15-19. The
    Commission is also considering whether to provide a safe
    harbor for callers that inadvertently reach reassigned numbers
    after consulting the most recently updated information. See
    
    id.
     at 6012 ¶ 14. Those proposals would naturally bear on the
    reasonableness of calling numbers that have in fact been
    reassigned, and have greater potential to give full effect to the
    Commission’s principle of reasonable reliance.
    C.
    It is undisputed that consumers who have consented to
    receiving calls otherwise forbidden by the TCPA are entitled
    to revoke their consent. See 2015 Declaratory Ruling, 30
    FCC Rcd. at 7996 ¶ 62. The statute, however, does not
    elaborate on the processes by which consumers may validly
    do so. The Commission sought to resolve the matter in its
    Declaratory Ruling.
    The Commission had been petitioned to clarify that
    callers can unilaterally prescribe the exclusive means for
    consumers to revoke their consent. It explicitly denied that
    41
    request. Allowing “callers to designate the exclusive means
    of revocation,” the Commission believed, could “materially
    impair” the “right of revocation.” 
    Id.
     at 7997 ¶ 66.
    The Commission instead concluded that “a called party
    may revoke consent at any time and through any reasonable
    means”—orally or in writing—“that clearly expresses a desire
    not to receive further messages.” 
    Id.
     at 7989-90 ¶ 47; 
    id.
     at
    7996 ¶ 63. In assessing whether a revocation request meets
    the “reasonable means” standard, the Commission said it
    would consider “the totality of the facts and circumstances.”
    
    Id.
     at 7996 ¶ 64 n.233. One relevant factor is “whether the
    caller could have implemented mechanisms to effectuate a
    requested revocation without incurring undue burdens.” 
    Id.
    Another consideration is “whether the consumer had a
    reasonable expectation that he or she could effectively
    communicate his or her request . . . in that circumstance.” 
    Id.
    Petitioners challenge the Commission’s treatment of
    revocations on various grounds, none of which we find
    persuasive.    Petitioners’ chief objection is that the
    Commission’s approach is arbitrary and capricious in
    eschewing the establishment of standardized revocation
    procedures in favor of an unduly uncertain, any-reasonable-
    means standard. Without the certainty of standardized
    procedures, petitioners fear, they will be able to ward off
    TCPA liability only by “tak[ing] exorbitant precautions.”
    ACA Int’l Br. 57.
    We think petitioners’ concerns are overstated. The
    Commission’s ruling absolves callers of any responsibility to
    adopt systems that would entail “undue burdens” or would be
    “overly burdensome to implement.” 30 FCC Rcd. at 7996
    ¶ 64 & n.233. In light of that assurance, callers would have
    no need to train every retail employee on the finer points of
    42
    revocation. And callers will have every incentive to avoid
    TCPA liability by making available clearly-defined and easy-
    to-use opt-out methods. If recipients are afforded such
    options, any effort to sidestep the available methods in favor
    of idiosyncratic or imaginative revocation requests might well
    be seen as unreasonable. The selection of an unconventional
    method of seeking revocation might also betray the absence
    of any “reasonable expectation” by the consumer that she
    could “effectively communicate” a revocation request in the
    chosen fashion. 
    Id.
    Petitioners observe that the Commission’s ruling itself
    dictates particular opt-out mechanisms for certain types of
    time-sensitive banking- and healthcare-related calls that the
    Commission exempted from the TCPA’s consumer consent
    requirements. 
    Id.
     at 8028 ¶ 138; 
    id.
     at 8032 ¶ 147. If the
    Commission prescribed specific opt-out methods for those
    types of calls, petitioners ask, then why not similarly set out
    standardized means of revocation for all calls?
    The Commission was not required to treat the two
    situations in a parallel manner. For the banking- and
    healthcare-related calls, the Commission found that the
    communications were sufficiently important to warrant an
    exemption from the otherwise-applicable obligation to obtain
    prior consent. 
    Id.
     at 8023 ¶ 125. As a result, the default rule
    for those calls is that they should be allowed (without regard
    to consent), such that the availability of an opt-out can be
    conditioned on adhering to specific procedures. By contrast,
    the default rule for non-exempted calls is that they are
    disallowed (absent consent), such that the availability of an
    opt-out naturally could be broader. In that context, the
    Commission could reasonably elect to enable consumers to
    revoke their consent without having to adhere to specific
    procedures.
    43
    Finally, petitioners object to the Declaratory Ruling
    insofar as it might preclude callers and consumers from
    contractually agreeing to revocation mechanisms.           The
    Commission correctly concedes, however, that the ruling “did
    not address whether contracting parties can select a particular
    revocation procedure by mutual agreement.” FCC Br. 64
    n.16. The ruling precludes unilateral imposition of revocation
    rules by callers; it does not address revocation rules mutually
    adopted by contracting parties. Nothing in the Commission’s
    order thus should be understood to speak to parties’ ability to
    agree upon revocation procedures.
    D.
    The last set of challenges before us, brought by petitioner
    Rite Aid, concerns the scope of the Commission’s exemption
    of certain healthcare-related calls from the TCPA’s prior-
    consent requirement for calls to wireless numbers. The
    Commission is statutorily authorized to exempt from that
    requirement “calls to a telephone number assigned to a
    cellular telephone service that are not charged to the called
    party, subject to such conditions as the Commission may
    prescribe as necessary in the interest of the privacy rights this
    section is intended to protect.” 
    47 U.S.C. § 227
    (b)(2)(C).
    The Commission was petitioned to exempt from the
    consent requirement “certain non-telemarketing, healthcare
    calls” alleged to “provide vital, time-sensitive information
    patients welcome, expect, and often rely on to make informed
    decisions.” 2015 Declaratory Ruling, 30 FCC Rcd. at 8030
    ¶ 143. The agency acknowledged the “exigency and public
    interest” in various types of healthcare-related calls, including
    ones “regarding post-discharge follow-up intended to prevent
    readmission, or prescription notifications.” 
    Id.
     at 8031 ¶ 146.
    But it was “concerned that these policy arguments are not
    44
    true” for other types of healthcare calls. 
    Id.
     Specifically, the
    Commission “fail[ed] to see the same exigency and public
    interest in calls regarding account communications and
    payment notifications.” 
    Id.
    Consequently, the Commission granted the requested
    exemption but “restrict[ed] it to calls for which there is
    exigency and that have a healthcare treatment purpose,
    specifically:   appointment and exam confirmations and
    reminders, wellness checkups, hospital pre-registration
    instructions, pre-operative instructions, lab results, post-
    discharge follow-up intended to prevent readmission,
    prescription notifications, and home healthcare instructions.”
    
    Id.
     The exemption would not cover calls “that include
    telemarketing, solicitation, or advertising content, or which
    include accounting, billing, debt-collection, or other financial
    content.” 
    Id.
    Petitioner Rite Aid challenges the Commission’s
    exemption for select healthcare-related calls on the grounds
    that it conflicts with another federal statute (the Health
    Insurance Portability and Accountability Act, or HIPAA) and
    is arbitrary and capricious.        Rite Aid’s arguments
    misunderstand the relevant statutory terrain, and we reject
    them.
    1.
    At the outset, we must satisfy ourselves that we have
    jurisdiction to entertain Rite Aid’s challenge. Rite Aid has
    been styled a petitioner here, but it did not formally petition
    the Commission in the proceedings before the agency. The
    petition granted by the Commission in part was filed by the
    American Association of Healthcare Administrative
    Management (the Association). Rite Aid expressed “support”
    45
    for the Association’s petition for a declaratory ruling and
    exemption, and it also asked the Commission to “address
    certain additional issues.” Comments of Rite Aid, Joint
    App’x 850. But it participated only by commenting on the
    Association’s petition rather than filing one of its own. As a
    result, with respect to relief that only Rite Aid sought, the
    Commission “decline[d] to fully address th[at] request for
    clarification . . . raised in a comment to a pending Petition.”
    2015 Declaratory Ruling, 30 FCC Rcd. at 8028-29 ¶ 141
    n.471. The Association did not appeal the FCC’s partial
    denial of its requested exemption. Instead, Rite Aid has
    petitioned the court to review that denial.
    Direct review of final FCC orders is governed by the
    Hobbs Act, under which “[a]ny party aggrieved by [a] final
    order” of the Commission may petition for review of that
    order. 
    28 U.S.C. § 2344
    . We have consistently held that the
    phrase “party aggrieved” requires that petitioners have been
    parties to the underlying agency proceedings, not simply
    parties to the present suit who are aggrieved in a
    constitutional (Article III) sense. See Simmons v. ICC, 
    716 F.2d 40
    , 42 (D.C. Cir. 1983). The question here is whether
    commenting on a petition in agency proceedings that resulted
    in a declaratory ruling suffices to confer “party aggrieved”
    status on a litigant whose position the agency rejected.
    We find it does. For agency proceedings that do not
    require intervention as a prerequisite to participation, our
    decisions have recognized that “party aggrieved” means a
    party who has “made a full presentation of views to the
    agency.” Water Transp. Ass’n v. ICC, 
    819 F.2d 1189
    , 1193
    (D.C. Cir. 1987). Rite Aid fulfilled that requirement. Just as
    “submitting comments” confers “party aggrieved” status in
    the context of a rulemaking (assuming an adverse outcome),
    Prof’l Reactor Operator Soc’y v. U.S. Nuclear Regulatory
    46
    Comm’n, 
    939 F.2d 1047
    , 1049 n.1 (D.C. Cir. 1991), one who
    comments on another’s petition for a rulemaking or
    declaratory ruling has “present[ed] its view to the agency [so
    as] to qualify as a ‘party,’” S. Pac. Transp. Co. v. ICC, 
    69 F.3d 583
    , 588 (D.C. Cir. 1995)—at least insofar as the issues
    appealed were also taken up by the petitioner below (as they
    were here). Rite Aid afforded the Commission an opportunity
    to consider its position on the Association’s exemption
    request. We therefore proceed to the substance of Rite Aid’s
    challenge.
    2.
    Rite Aid contends that, “[b]y restricting otherwise
    permissible HIPAA communications,” the Declaratory Ruling
    “conflicts with another federal law.” Rite Aid Br. 12 (quoting
    NextWave Pers. Commc’ns, Inc. v. FCC, 
    254 F.3d 130
    , 149
    (D.C. Cir. 2001)). It essentially argues that any partial
    exemption of healthcare-related communications would have
    been unlawful, because HIPAA—the exclusive source of
    federal law on the disclosure of protected health
    information—operates of its own force to supersede any
    TCPA prohibition on healthcare calls. Rite-Aid is incorrect.
    There is no obstacle to complying with both the TCPA and
    HIPAA; “[t]he two statutes provide separate protections.”
    Mais v. Gulf Coast Collection Bureau, Inc., 
    768 F.3d 1110
    ,
    1125 (11th Cir. 2014).
    Under HIPAA regulations, covered entities and their
    business associates presumptively “may not use or disclose
    protected health information.” 
    45 C.F.R. § 164.502
    (a). But
    they are generally permitted to use or disclose that
    information “for treatment, payment, or health care
    operations.” 
    Id.
     § 164.506(a). Rite Aid complains that the
    partial exemption granted in the Declaratory Ruling conflicts
    47
    with HIPAA because it stops short of exempting billing- and
    account-related communications—i.e., ones “for . . .
    payment.” Id. But all that § 164.506(a)’s exclusion does is to
    carve out an exception to civil and criminal liability for using
    or disclosing protected health information. See 42 U.S.C.
    §§ 1320d-5, 1320d-6.         It says nothing about the
    Commission’s authority to exempt (or refrain from
    exempting) certain kinds of calls from the TCPA’s consent
    requirement.
    In confining the use of its exemption authority, the
    Commission did not restrict communications that HIPAA
    requires be permitted to flow freely. It simply declined to
    make certain exchanges even less burdensome than they
    would have been by default. If Rite Aid were correct,
    healthcare providers could use ATDS equipment to bombard
    nonconsenting wireless users with calls and texts concerning
    outstanding charges without incurring TCPA liability.
    Nothing in HIPAA commands such a result, and we see no
    basis to interpret it to frustrate the TCPA in that way.
    3.
    Finally, Rite Aid contends that the Declaratory Ruling’s
    exemption for certain healthcare calls is arbitrary and
    capricious. Neither of its suggested grounds is persuasive.
    a. Rite Aid first argues that the Commission failed to
    explain its purported departure from its earlier practice of
    exempting HIPAA-protected communications. In addition to
    its restrictions on calls to wireless numbers, the TCPA also
    forbids the use of an ATDS “to initiate any telephone call to
    any residential telephone line using an artificial or
    prerecorded voice to deliver a message without the prior
    express consent of the called party,” unless one of three
    48
    exceptions applies.     
    47 U.S.C. § 227
    (b)(1)(B) (emphasis
    added).
    In a 2012 Order, the Commission exempted from that
    consent requirement “prerecorded health care-related calls to
    residential lines, which are already regulated by” HIPAA. In
    re Rules and Regulations Implementing the Telephone
    Consumer Protection Act of 1991 (2012 Order), 27 FCC Rcd.
    1830, 1837 ¶ 18 (2012). Some parts of the Order suggested
    that its exemption reached no further than the one granted in
    2015’s Declaratory Ruling for calls to wireless numbers.
    Exempted calls were described as “promot[ing] important
    communications . . . such as prescription refills and
    immunization reminders,” 
    id.
     at 1855 ¶ 63 n.192, and
    “concern[ing] consumers’ health, not the purchase of a good
    or service,” 
    id.
     at 1856 ¶ 63 n.195. But the Order elsewhere
    characterized its exemption as covering “all prerecorded
    health care-related calls to residential lines that are subject to
    HIPAA.” 
    Id.
     at 1852 ¶ 57 (emphases added).
    The 2012 Order’s exemption was codified in 
    47 C.F.R. § 64.1200
    (a)(3)(v). That regulation did not use the phrase
    “health care-related call[],” but instead referred to “‘health
    care’ message . . . [as] defined in the HIPAA Privacy Rule, 
    45 C.F.R. § 160.103
    .” 
    47 C.F.R. § 64.1200
    (a)(3)(v). Likewise,
    § 160.103 does not mention the term “health care message.”
    But it does define “health care” as “care, services, or supplies
    related to the health of an individual.” 
    45 C.F.R. § 160.103
    .
    That term includes, among many other things, “[s]ale or
    dispensing of a drug, device, equipment, or other item in
    accordance with a prescription.” 
    Id.
     A “‘health care’
    message” is presumably a message pertaining to any of the
    topics that “health care” is defined to include. We assume for
    present purposes that some calls concerning the “[s]ale . . . of
    a drug . . . in accordance with a prescription” would relate to
    49
    “billing,” which the 2015 Declaratory Ruling did not exempt
    from the consent requirement.
    Rite Aid is therefore correct that, in one sense, the 2012
    exemption swept more broadly than the 2015 version. We
    also accept that the 2012 Order cited a number of
    “technology-agnostic justifications” for exempting all
    prerecorded healthcare-related calls subject to HIPAA and
    made to residential lines. Rite Aid Br. 5. For example, the
    Commission believed that such calls “ensure continued
    customer access to health care-related information” and
    would not lead to “coercive or abusive” interactions. 2012
    Order, 27 FCC Rcd. at 1853-54 ¶¶ 59-60.
    The relevant question is whether the Commission acted
    arbitrarily and capriciously in affording a narrower exemption
    for healthcare-related calls made to wireless numbers. We
    find that it did not. Even if one might hypothesize “important
    reasons for treating residential and wireless telephone lines
    the same,” Rite Aid Br. 9, the TCPA itself presupposes the
    contrary—that calls to residential and wireless numbers
    warrant differential treatment.
    Unlike with the autodialer restrictions on calls to wireless
    numbers, callers are free to use ATDS equipment to dial
    residential lines as long as no “artificial or prerecorded voice”
    is used. 
    47 U.S.C. § 227
    (b)(1)(B). The statute itself
    contemplates that calls to wireless numbers “tread [more]
    heavily upon . . . consumer privacy interests.” 2012 Order, 27
    FCC Rcd. at 1855 ¶ 63. That concern directly informed the
    2015 exemption’s scope: the Commission concluded that
    messages “not critical to a called party’s healthcare . . . do not
    justify setting aside a consumer’s privacy interests.” 2015
    Declaratory Ruling, 30 FCC Rcd. at 8031 ¶ 146.
    50
    In short, there is nothing inherently contradictory about
    easing restrictions on certain kinds of calls to landlines, but
    not to cellular phones. And Rite Aid fails to mention another
    variable that confounds direct comparisons between the two
    exemptions. As codified, the 2012 exemption applies only to
    calls that “us[e] an artificial or prerecorded voice to deliver a
    message,” 
    47 C.F.R. § 64.1200
    (a)(3); the Declaratory
    Ruling’s exemption is not so limited. We therefore reject Rite
    Aid’s first arbitrary-and-capricious challenge.
    b. Lastly, Rite Aid argues that the Commission acted
    arbitrarily by failing to recognize that all healthcare-related
    calls satisfy the TCPA’s “emergency purposes” exception to
    the consent requirement. As used in the Act, “[t]he term
    emergency purposes means calls made necessary in any
    situation affecting the health and safety of consumers.” 
    47 C.F.R. § 64.1200
    (f)(4). But Rite Aid identifies no calls
    satisfying that exception that were not already subject to the
    2015 exemption. It would be implausible to conclude that
    calls concerning “telemarking, solicitation, or advertising
    content, or which include accounting, billing, debt-collection,
    or other financial content” are made for “emergency
    purposes.” 2015 Declaratory Ruling, 30 FCC Rcd. at 8031
    ¶ 146. Even if accounting systems are in some sense
    “necessary” to the continued provision of healthcare,
    “[t]imely delivery of these types of messages is not critical”
    to that goal. 
    Id.
     (emphasis added).
    In marked contrast, the Commission recently exempted
    calls concerning certain time-sensitive risks to students’
    health and safety in the school setting. That list of scenarios
    included “weather closures, fire, . . . threats,” “dangerous
    persons, health risks (e.g., toxic spills), and unexcused
    absences.” In re Rules and Regulations Implementing the
    Telephone Consumer Protection Act of 1991, 31 FCC Rcd.
    51
    9054, 9061 ¶ 17, 9063 ¶ 21 (2016). In declining a request to
    interpret the emergency-purposes exception far more
    expansively, we are guided by its role in the statutory scheme.
    Consumers may find themselves wholly unable to stave off
    calls satisfying the exception. That is because, by definition,
    such calls fall outside the TCPA’s consent framework; callers
    can make them even if recipients are known to object.
    Advertisements, solicitations, and post-treatment financial
    communications do not arise from the sorts of “emergencies”
    that would justify suspending the TCPA’s consent regime.
    The Commission was empowered to draw the distinction
    it did, and it adequately explained its reasons for doing so.
    We therefore reject Rite Aid’s arbitrary-and-capricious
    challenge.
    *   *   *    *   *
    For the foregoing reasons, we grant in part and deny in
    part the petitions for review.
    So ordered.