Bayley's Campground Inc v. Mills ( 2021 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 20-1559
    BAYLEY'S CAMPGROUND, INC., d/b/a Bayley's Camping Resort;
    FKT RESORT MANAGEMENT, LLC; FKT BAYLEY LIMITED PARTNERSHIP;
    CURTIS BONNELL, DOLORES HUMISTON, and JAMES BOISVERT,
    Plaintiffs, Appellants
    v.
    JANET T. MILLS, in her official capacity as the Governor of the
    State of Maine,
    Defendant, Appellee.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MAINE
    [Hon. Lance E. Walker, U.S. District Judge]
    Before
    Howard, Chief Judge,
    Selya and Barron, Circuit Judges.
    Tyler J. Smith, with whom Gene R. Libby and Libby O'Brien
    Kingsley & Champion, LLC, were on brief, for appellants.
    Christopher C. Taub, Deputy Attorney General, Chief,
    Litigation Division, with whom Aaron M. Frey, Attorney General,
    and Kimberly L. Patwardhan, Assistant Attorney General, were on
    brief, for appellee.
    January 19, 2021
    BARRON, Circuit Judge.   In the spring of 2020, as the
    United States confronted the COVID-19 pandemic, the Governor of
    Maine issued an executive order that, with few exceptions, required
    persons traveling to that state to self-quarantine upon their
    arrival for a period of fourteen days before venturing out in
    public.   The plaintiffs here -- three individuals who intended to
    travel from New Hampshire to Maine and certain businesses reliant
    on out-of-state customers -- filed suit in response.       They alleged
    that    the   self-quarantine   requirement   violated   their   federal
    constitutional right to interstate travel as well as their federal
    constitutional right to procedural due process, and they sought a
    preliminary injunction prohibiting the requirement's enforcement.
    The District Court rejected the request to issue the preliminary
    injunction because it determined that the plaintiffs had not met
    their burden to show that they had a likelihood of success on the
    merits of their federal constitutional claims.      The plaintiffs now
    appeal the portion of that ruling that concerns the right-to-
    travel claim, which we affirm, after concluding that the fact that
    the Governor rescinded the executive order that contains the self-
    quarantine requirement that is at issue here during the pendency
    of this appeal and replaced that order with one that imposed a
    less restrictive self-quarantine requirement does not moot the
    case.
    - 2 -
    I.
    On April 3, 2020, the Governor issued Executive Order 34
    ("EO 34").     Titled "An Order Establishing Quarantine Restrictions
    on Travelers Arriving in Maine," EO 34 required, with limited
    exceptions, all persons, "resident or non-resident," who were
    "traveling into Maine" to "immediately self-quarantine for 14
    days" upon their arrival in the state.                 EO 34 also directed all
    lodging   operations        in   Maine,    including    campgrounds,       to   cease
    providing services aside from "[h]ousing vulnerable populations,"
    "[p]roviding accommodations for health care workers," furnishing
    "self-quarantine       or    self-isolation         facilities,"     or    offering
    additional      services         pursuant      to    "verifiable         extenuating
    circumstances."     EO 34 provided that it would "be enforced by law
    enforcement" and that a violation of its terms could "be charged
    as a Class E crime subject to a penalty of up to six months in
    jail and a $1,000 fine."
    The   individual       plaintiffs       are   two     New     Hampshire
    residents, Curtis Bonnell and Dolores Humiston, and one Maine
    resident, James Boisvert.           The corporate plaintiffs -- Bayley's
    Campground,    Inc.,    d/b/a      Bayley's     Camping    Resort;       FKT    Resort
    Management, LLC; FKT Bayley Limited Partnership; and DMJ Parks,
    - 3 -
    LLC d/b/a Little Ossipee Campground1 -- operate campgrounds and
    related businesses in Maine.                 Both Bonnell and Humiston are
    consistent, seasonal patrons of Bayley's Campground.
    The plaintiffs filed suit in the federal court for the
    District of Maine on May 15, 2020, in which they sought declaratory
    and injunctive relief from EO 34 on right-to-travel and procedural-
    due-process grounds.              The plaintiffs concurrently moved for a
    preliminary       injunction.2        The   complaint    alleged,   among    other
    things, that the self-quarantine requirement that EO 34 imposed
    "practically"          prevented    the   three    individual   plaintiffs    from
    traveling between Maine and New Hampshire "to recreate, associate
    with friends, visit businesses, and simply take trips."                       The
    complaint       also    alleged    that   the     requirement   caused   "economic
    injury" to the corporate plaintiffs due to "a substantial number
    of cancellations by out-of-state campers who [we]re unable or
    unwilling to self-quarantine for 14[] days upon their arrival to
    Maine."
    1
    DMJ Parks, LLC d/b/a Little Ossipee Campground is not
    a party to this appeal, as it voluntarily dismissed its appeal
    under Fed. R. App. P. 42(b).
    2
    Before the District Court, the plaintiffs also sought
    preliminary injunctive relief from EO 34's prohibition against
    "the Campground plaintiffs . . . opening to out-of-state visitors
    until those visitors have completed a 14-day quarantine," but their
    appeal concerns only their request to preliminarily enjoin the
    self-quarantine requirement imposed on individual travelers to
    Maine.
    - 4 -
    The Governor filed an opposition to the preliminary
    injunction motion on May 25, 2020, and, on May 29, the District
    Court denied the motion.           See Bayley's Campground, Inc. v. Mills,
    
    463 F. Supp. 3d 22
    , 38 (D. Me. 2020).              In so ruling, the District
    Court agreed with the plaintiffs that EO 34's self-quarantine
    requirement       implicated      the    federal     constitutional      right     to
    interstate        travel   and     was   subject     to     strict    scrutiny     in
    consequence.         
    Id. at 31-35
    .        But, "at this early stage," the
    District Court concluded, in light of what the record showed about
    the   Governor's      basis     for   concluding     that   the   self-quarantine
    requirement would slow the spread of the virus in Maine and protect
    the state's health care system from being overwhelmed by patients
    infected with the disease, the plaintiffs had failed to show that
    their     right-to-travel        claim   regarding    the    requirement     had   a
    likelihood of success on the merits.               
    Id. at 35
    .        On that basis,
    the District Court denied the requested preliminary relief on that
    claim.3      
    Id. at 38
    .
    The plaintiffs filed this interlocutory appeal on June
    1, 2020, in which they challenged that ruling, and they also moved
    at    that    time   for   an    injunction      against    the   self-quarantine
    requirement pending appeal.              On June 25, 2020, a panel of this
    3
    The District Court also held that the plaintiffs were
    unlikely to succeed on their procedural due process claim, a
    decision which the plaintiffs do not challenge on appeal.
    - 5 -
    Court   denied    the   plaintiffs'    motion.     An   expedited    briefing
    schedule was set.
    Shortly      after   the   plaintiffs   filed   their    notice   of
    appeal, on June 9, 2020, the Governor rescinded EO 34 in its
    entirety and replaced it with Executive Order 57 ("EO 57").                  The
    new executive order contained a 14-day self-quarantine requirement
    that was identical to EO 34's save for additional exceptions that
    restricted its scope.           As relevant here, EO 57, unlike EO 34,
    exempted from the requirement to self-quarantine all persons who
    (1) "[r]eceive[d] a recent negative test for COVID-19 in accordance
    with standards established by" the Maine Center for Disease Control
    and Prevention ("Maine CDC"), or (2) were "residents of New
    Hampshire and Vermont, or . . . Maine residents returning from
    travel to New Hampshire and Vermont." EO 57 also permitted lodging
    operations, including campgrounds, to offer normal services to
    persons in compliance with EO 57 -- but tasked such operations
    with collecting "a complete certificate stating compliance with
    this Order from each individual subject to [the self-quarantine]
    requirement as a prerequisite to check-in."
    In the wake of EO 57, the parties addressed in their
    briefing to us whether the plaintiffs' request for a preliminary
    injunction to prohibit the enforcement of EO 34's self-quarantine
    requirement on right-to-travel grounds is moot.               We begin our
    analysis   with    this    threshold    jurisdictional     question,    which
    - 6 -
    concerns whether the parties' dispute over the plaintiffs' request
    for injunctive relief from the now-rescinded requirement from EO
    34 presents a "case or controversy" within the meaning of Article
    III of the federal Constitution.     See U.S. Const. Art. III § 2 cl.
    1; Redfern v. Napolitano, 
    727 F.3d 77
    , 82 (1st Cir. 2013).
    II.
    "[A] case is moot when the issues presented are no longer
    live or the parties lack a legally cognizable interest in the
    outcome.   Another way of putting this is that a case is moot when
    the court cannot give any effectual relief to the potentially
    prevailing party."   Town of Portsmouth v. Lewis, 
    813 F.3d 54
    , 58
    (1st Cir. 2016) (quoting Am. C.L. Union of Mass. ("ACLUM") v. U.S.
    Conf. of Cath. Bishops, 
    705 F.3d 44
    , 52 (1st Cir. 2013)).
    The plaintiffs contend that, even though EO 34 has been
    superseded by EO 57, their request for injunctive relief from the
    self-quarantine requirement is not moot because it pertains to an
    executive action that the Governor voluntarily rescinded and could
    unilaterally reimpose.    See Roman Cath. Diocese of Brooklyn v.
    Cuomo, 
    141 S. Ct. 63
    , 68 (2020) (per curiam); City of Mesquite v.
    Aladdin's Castle, 
    455 U.S. 283
    , 289 (1982).     We agree.
    To be sure, nothing in the record suggests that the
    Governor rescinded EO 34 for litigation-related reasons rather
    than to account for changing conditions owing to the course of the
    virus itself.   Cf. Ne. Fla. Chapter of Assoc. Gen. Contractors of
    - 7 -
    Am.    v.   City   of    Jacksonville,    
    508 U.S. 656
    ,    661-62    (1993)
    (explaining     that     rescinding   executive      action       for    litigation
    reasons does not necessarily moot a challenge to it).                   Indeed, any
    decision by the Governor to issue an executive order that imposes
    the same requirement to self-quarantine that EO 34 imposed would
    most likely be predicated on at least somewhat different facts and
    considerations.         The dynamic nature of both the virus that has
    given rise to this pandemic and the public health response to it
    all but ensures that would be so, just as the dynamic nature of
    both the virus and the response appears to explain why EO 34 was
    rescinded in favor of EO 57.
    Against this background, there is a question whether the
    issues presented by the plaintiffs' request for relief from EO
    34's   self-quarantine      requirement       --   given    that    it    has   been
    rescinded -- could recur. See Trinity Lutheran Church of Columbia,
    Inc. v. Comer, 
    137 S. Ct. 2012
    , 2019 n.1 (2012); Friends of the
    Earth, Inc. v. Laidlaw Envtl. Servs. (TOC), Inc., 
    551 U.S. 167
    ,
    189 (2000).     But, the Governor has not denied that a spike in the
    spread of the virus in Maine could lead her to impose a self-
    quarantine requirement just as strict as EO 34's.                 Thus, we cannot
    say that the Governor has carried "the formidable burden" that she
    bears "of showing that it is absolutely clear the allegedly
    wrongful behavior could not reasonably be expected to recur."
    ACLUM, 705 F.3d at 55 (quoting Friends of the Earth, 528 U.S. at
    - 8 -
    190); see also Trinity Lutheran, 137 S. Ct. at 2019 n.1; Ne. Fla.
    Chapter, 
    508 U.S. at 662
    .             A contrary ruling, moreover, would run
    the   risk       of   effectively     insulating    from   judicial   review    an
    allegedly overly broad executive emergency response, so long as it
    is iteratively imposed for only relatively brief periods of time.
    Accordingly,          we   conclude    that   the   plaintiffs'   request      for
    injunctive relief from EO 34's self-quarantine requirement is not
    moot, see Roman Cath. Diocese, 141 S. Ct. at 68; Elim Romanian
    Pentecostal Church v. Pritzker, 
    962 F.3d 341
    , 344-45 (7th Cir.
    2020), and so we turn to the merits.4
    III.
    "The framework for considering whether to grant or deny
    a preliminary injunction" is well settled:
    An inquiring court must gauge the movant's
    likelihood of success on the merits; must
    evaluate whether and to what extent the movant
    will suffer irreparable harm if injunctive
    relief is withheld; must calibrate the balance
    of hardships as between the parties; and must
    consider the effect, if any, that the issuance
    of an injunction (or the withholding of one)
    will have on the public interest.
    Akebia Therapeutics, Inc. v. Azar, 
    976 F.3d 86
    , 92 (1st Cir. 2020).
    4
    There is no problem with our reaching the merits based
    on any concern about a lack of Article III standing on the part of
    the plaintiffs, because the individual plaintiffs plainly have
    suffered an injury-in-fact. See Massachusetts v. EPA, 
    549 U.S. 497
    , 518 (2007) ("Only one of the petitioners needs to have
    standing to permit us to consider the [merits]."); Bowsher v.
    Synar, 
    478 U.S. 714
    , 721 (1986) (similar).
    - 9 -
    We review the District Court's decision declining to issue a
    preliminary   injunction   "for   an    abuse   of   discretion,   with
    conclusions of law reviewed de novo and findings of fact for clear
    error."   Trafon Grp., Inc. v. Butterball, LLC, 
    820 F.3d 490
    , 493
    (1st Cir. 2016).
    The fact that the plaintiffs are seeking a preliminary
    injunction against a self-quarantine requirement set forth in an
    executive order that was issued and then rescinded in response to
    a dynamic public health crisis bears on whether the plaintiffs can
    make the requisite showing under both the irreparable harm and
    public interest prongs of the test just described.         But, rather
    than address those prongs of that test, we begin and end our
    analysis with the likelihood-of-success-on-the-merits prong, as we
    agree with the District Court that the plaintiffs failed to meet
    their burden to satisfy it, see Bayley's Campground, 463 F. Supp.
    3d at 33-34, and a failure to do so is itself preclusive of the
    requested relief, see New Comm Wireless Servs., Inc. v. SprintCom,
    Inc., 
    287 F.3d 1
    , 9 (1st Cir. 2002); see also Akebia Therapeutics,
    976 F.3d at 92 ("If the movant fails to demonstrate a likelihood
    of success on the merits, the remaining elements are of little
    consequence.").    Because the likelihood of success issue presents
    a question of law in this case, our review of the District Court's
    decision on that question is de novo.       See Akebia Therapeutics,
    976 F.3d at 92.
    - 10 -
    A.
    "The   textual    source    of   the    constitutional    right   to
    travel . . . has proved elusive," but, "[w]hatever its origin, the
    right to migrate is firmly established."              Att'y Gen. of N.Y. v.
    Soto-Lopez, 
    476 U.S. 898
    , 902-03 (1986) (plurality opinion); see
    also Saenz v. Roe, 
    526 U.S. 489
    , 498 (1999).                     This federal
    constitutional right includes at least three distinct components:
    [1] the right of a citizen of one State to
    enter and to leave another State, [2] the
    right to be treated as a welcome visitor
    rather   than   an  unfriendly   alien   when
    temporarily present in the second State, and,
    [3] for those travelers who elect to become
    permanent residents, the right to be treated
    like other citizens of that State.
    Saenz, 
    526 U.S. at 500
    .
    The    Governor    argues    that      EO   34's   self-quarantine
    requirement   does   not    "burden[]"     or    "implicate[]"    the   right,
    because it "imposes no barrier to entry . . . and treats residents
    and non-residents precisely the same."                For that reason, she
    contends, the requirement is not subject to the strict scrutiny
    that the plaintiffs argue applies and thus the requirement need
    not constitute the least restrictive means of serving a compelling
    governmental interest.5
    5 Some courts have suggested that intermediate scrutiny
    may be appropriate if a challenged regulation burdening the right
    to travel is akin to a "time, place and manner restriction[],"
    Lutz v. City of York, 
    899 F.2d 255
    , 269 (3d Cir. 1990); see also
    - 11 -
    We may assume, however, that the District Court was
    correct to rule both that the requirement does burden the federal
    constitutional right to interstate travel and that the requirement
    is subject to strict scrutiny in consequence.                        See Bayley's
    Campground, 463 F. Supp. 3d at 31-35.                 For, as we will explain,
    even on those assumptions, the District Court was right to hold
    that the plaintiffs failed to meet their burden to show that they
    have a likelihood of success on the merits.
    B.
    The Governor contends that -- assuming strict scrutiny
    does apply -- the interests in "protecting Maine's population from
    further spread of the COVID-19 virus and preventing Maine's health
    care system from being overwhelmed" by those infected with it are
    "compelling    state   interests."             The   plaintiffs     do    not   argue
    otherwise    on   appeal,    nor     do    we   see    how   they    could      do   so
    successfully. See Roman Cath. Diocese, 141 S. Ct. at 67 ("Stemming
    the spread of COVID-19 is unquestionably a compelling interest.");
    see also Zemel v. Rusk, 
    381 U.S. 1
    , 15–16 (1965) ("The right to
    travel within the United States is of course . . . constitutionally
    protected.     But that freedom does not mean that areas ravaged
    by . . .     pestilence     cannot    be       quarantined    when       it   can    be
    Johnson v. City of Cincinnati, 
    310 F.3d 484
    , 502 n.9 (6th Cir.
    2002), but no party suggests that intermediate scrutiny may on
    that basis be appropriate here.
    - 12 -
    demonstrated that unlimited travel to the area would directly and
    materially interfere with the safety and welfare of the area or
    the Nation as a whole." (citation omitted)); Edwards v. California,
    
    314 U.S. 160
    , 184 (1941) (Jackson, J., concurring) (explaining
    that   "[t]he    right    of   the   citizen   to   migrate    from   state   to
    state . . . is not . . . an unlimited one," and that certainly a
    citizen may not "endanger others by carrying contagion about");
    R.R. Co. v. Husen, 
    95 U.S. 465
    , 472 (1877) ("[W]e unhesitatingly
    admit that a State may pass sanitary laws, and . . . for the
    purpose of self-protection it may establish quarantine, . . .
    [although a State] may not interfere with transportation into or
    through the State, beyond what is absolutely necessary for its
    self-protection."); Smith v. Turner, 48 U.S. (7 How.) 283, 414
    (1849) (opinion of Wayne, J.) ("[T]he States of this Union may, in
    the exercise of their police powers, pass quarantine and health
    laws, interdicting vessels coming from . . . ports within the
    United States, from landing passengers and goods, prescribe the
    places and time for vessels to quarantine, and impose penalties
    upon persons for violating the same.").
    Thus, the key question on appeal concerns the strength
    of the support in the record for the Governor's further assertion
    that    "there     were        no    other     effective      less-restrictive
    alternative[]" means of serving Maine's compelling interests at
    the time that EO 34's self-quarantine requirement was in place.
    - 13 -
    Given our assumption that strict scrutiny applies, the plaintiffs
    contend that the burden is on the Governor to show that this
    assertion        about   the   absence    of   equally   effective   but   less
    restrictive means is correct, because if she cannot make that
    showing, they contend that they necessarily will have met the
    burden that they bear to show that they have a likelihood of
    succeeding       on   the   merits   of   their   right-to-interstate-travel
    claim.
    We may assume that the plaintiffs have properly framed
    the nature of the inquiry.           For, even so framed, we agree with the
    District Court that, on this record, the Governor has provided
    adequate support for the conclusion that no less restrictive but
    equally effective alternative was available to her during the time
    period at issue.         See Bayley's Campground, 463 F. Supp. 3d at 27-
    28, 35.     The Governor's evidentiary case on this score included,
    most prominently, a declaration from the Maine CDC Director, Dr.
    Nirav Shah.        He was a member of the state's Coronavirus Response
    Team that the Governor convened on March 2, 2020, prior to issuing
    EO 34 and whose advice she sought in issuing that order.                   The
    District Court relied on Dr. Shah's declaration, as well as other
    evidence in the record, to find as follows.6
    6
    The plaintiffs do not challenge the District Court's
    factual determinations on appeal, nor do we perceive any basis for
    setting them aside as clearly erroneous.
    - 14 -
    First, the District Court supportably found that the
    virus was understood during the period that EO 34 was in effect
    -- as it remains (tragically) to this day -- to be both easily
    transmissible and unusually deadly.              See id. at 27.          Indeed, the
    record demonstrated that, as of May 25, the virus had already
    killed nearly 100,000 people across the country, though less than
    80 in Maine itself.      Id.
    Second, the District Court found, supportably, that it
    was   understood    at   the   relevant     time       that    the    virus   had   an
    incubation period of up to fourteen days and that it was common
    for   a   person   infected    with    it   to    be    highly       contagious     but
    asymptomatic.      Id.; see also id. ("Approximately 40% of all COVID-
    19 transmission can occur while individuals are asymptomatic and
    approximately 35% of all COVID-19 patients do not have symptoms at
    all.").    The District Court supportably found, however, that at
    that early stage of the pandemic, there was no vaccine or broadly
    effective treatment for COVID-19 in place.                Id.        Nor, the record
    showed, were there at that time "sufficient quantities" of test
    kits in the state to permit effective testing of the population,
    thereby making contact tracing of those who had come into contact
    with an infected person all but impossible.                   Id. at 28.
    The District Court then also supportably found -- based
    on the predicate findings just described -- that it was a "critical
    strategy in combatting the COVID-19 virus . . . to slow its spread
    - 15 -
    by limiting the extent to which persons come in contact with one
    another."     Id. at 27.   And, the District Court supportably found,
    Maine had special reason to implement this strategy that spring,
    based on the influx of travelers that it could expect in due
    course.      In the summer of 2019, Maine experienced "roughly 22
    million people travel[ing] to Maine for purposes of temporary
    recreation" -- a number that dwarfed the state's "year-round
    population    of   1.3   million."      Id.       Such    an   influx    would   be
    concerning to Maine in the face of the pandemic, moreover, because,
    as the District Court found, as of May 25, 2020, Maine had a total
    of only "391 critical care hospital beds and 318 conventional
    ventilators," many of which were already occupied.                Id.
    We thus see no merit in the plaintiffs' contention that
    the Governor failed to put forward "an affirmative, competent
    evidentiary showing" that could suffice to establish the need for
    the self-quarantine requirement, if they mean to suggest by that
    contention that no evidence in the record supported the conclusion
    that   the   requirement    constituted       a   means   of   serving    Maine's
    compelling interests in managing the fallout from the pandemic.
    As we have just explained, the record supportably showed that, as
    the District Court found, the COVID-19 virus was deadly, highly
    contagious, and spreading rapidly in other parts of the country;
    there was not then evidence of similar widespread infection in
    Maine itself; no known treatment or cure nor any easy means of
    - 16 -
    detecting the virus existed in Maine at the relevant time; it could
    be spread by persons who were asymptomatic but infected with it;
    it had an incubation period of up to two weeks; and Maine could
    reasonably expect an increase in its population as large as 2,000%
    over the coming summer months, while its critical care capacity in
    its health system was already half full.      With those findings in
    place, the District Court had a strong foundation from which to
    find -- as it did -- that EO 34's self-quarantine requirement would
    make it "unlikely that [the travelers subject to it would be]
    infected with the virus" when they interacted with others in Maine.
    Id.   Additionally, the District Court had a strong foundation to
    find -- as it did -- that, through EO 34, Maine would permit travel
    to the state while "both reduc[ing] the spread of the COVID-19
    virus in Maine and reduc[ing] and/or prevent[ing] an undue strain
    on Maine's health care system."    Id.
    The   plaintiffs   separately   argue,   however,   that   the
    Governor's showing still comes up short, by pointing to what they
    contend are various less restrictive alternative approaches to
    addressing the virus that were available to the Governor at the
    time EO 34 was in place.     They contend that the record fails to
    show that these alternative approaches would not have been at least
    as effective in responding to the virus as the self-quarantine
    requirement.    But, here, too, we are not persuaded.
    - 17 -
    In pressing this aspect of their case, the plaintiffs
    first posit that the Governor could have merely recommended rather
    than mandated travelers to self-quarantine upon their arrival.
    After all, they contend, the Governor has failed to show why such
    a recommendation would not have been at least as effective as the
    requirement she imposed. But, the plaintiffs put forth no evidence
    -- nor cite to any authority -- that would support the conclusion
    that the Governor could not at that early stage of the pandemic
    rely on the common sense understanding that legal mandates induce
    greater compliance than do precatory requests.           Cf. Van Hollen,
    Jr. v. Fed. Election Comm'n, 
    811 F.3d 486
    , 497 (D.C. Cir. 2016)
    ("[There is] no[] require[ment] to hold a hearing to prove what
    common sense shows." (quoting San Luis Obispo Mothers for Peace v.
    U.S. Nuclear Regul. Comm'n, 
    789 F.2d 26
    , 44 (D.C. Cir. 1986)));
    cf. also Mapp v. Ohio, 
    367 U.S. 643
    , 655 (1961) ("[W]ithout the
    [exclusionary     sanction,]   the    assurance    against   unreasonable
    federal searches and seizures would be 'a form of words' [and]
    valueless.").
    Nor does the fact that Dr. Shah stated that EO 34 was
    designed to "err[] on the side of caution" demonstrate that the
    self-quarantine     requirement      was,   as   the   plaintiffs   claim,
    "intentionally overbroad" and thus, necessarily, more restrictive
    than necessary.     That statement just suggests that Dr. Shah and
    the Governor were of the view that the risk of taking a less
    - 18 -
    cautious   approach   than   the    one   reflected    in   EO   34   was   not
    acceptable when so little was then known about the novel virus.
    See Competitive Enter. Inst. v. U.S. Dep't of Transp., 
    863 F.3d 911
    , 917 (D.C. Cir. 2017) (recognizing that a "precautionary
    approach" can be appropriate when decisionmakers confront "limited
    evidence" about the true extent of known risks).7
    The plaintiffs next suggest that EO 34's self-quarantine
    requirement could have been just as effective if it had been
    limited to apply only when "reasonable cause [existed] to believe
    that the person has been exposed to [or infected with] COVID-19."
    But, the plaintiffs do not explain how such a "reasonable cause"
    standard would have been practicably administrable in Maine in
    early 2020, given the lack of testing capacity in the state at
    that time, the significant uncertainty regarding the strength and
    duration of any immunity to the virus, and the fact of asymptomatic
    transmission.
    Indeed,    Dr.    Shah    explained    in    his      unchallenged
    declaration that limiting the self-quarantine requirement to only
    7The plaintiffs also assert in passing that EO 34 is
    somehow "underinclusive," but "appellate arguments advanced in a
    perfunctory manner, unaccompanied by citations to relevant
    authority, are deemed waived," Ahmed v. Holder, 
    611 F.3d 90
    , 98
    (1st Cir. 2010).    In consequence, we do not have a contention
    before us like those that have been made in cases challenging
    various restrictions meant to slow the spread of the virus on free
    exercise grounds. See, e.g., Roman Cath. Diocese, 141 S. Ct. at
    66-67; Agudath Israel of Am. v. Cuomo, 
    2020 WL 7691715
    , at *1 (2d
    Cir. Dec. 28, 2020).
    - 19 -
    persons exhibiting symptoms (or relying solely on contact tracing)
    would have been a significantly less effective alternative, given
    that asymptomatic spread of COVID-19 was common.         Dr. Shah further
    explained that while, "[i]n the future, it might be possible to
    exempt from the 14-day requirement those individuals who can
    document that they already had, and recovered from, COVID-19," at
    the   time   there   was   "significant    scientific   uncertainty   about
    whether individuals who have previously been infected with COVID-
    19 develop sufficient immunity to prevent them from transmitting
    the virus."      And, Dr. Shah added, implementing a test-based
    exception was similarly impracticable at the time due to "an
    inadequate national supply of the test kits needed" to test for
    the virus.8
    The plaintiffs' failure to account for concerns about
    administrability also undermines their related contention that the
    Governor did not meet her burden to show that a self-quarantine
    requirement that allowed those subject to it to comply with it
    immediately before traveling to Maine would not have been just as
    effective as the self-quarantine requirement that EO 34 imposed.
    8
    Dr. Shah also represented that "[a]s the supply of test
    kits increases, . . . [Maine CDC] will continue to evaluate the
    use of the tests as a substitute for, or an addition to, the
    existing quarantine requirement." In light of his affidavit, this
    is not a case where, as the plaintiffs contend, "[t]he record is
    silent as to the comparative effectiveness of the [proposed]
    alternatives." United States v. Playboy Ent. Grp., 
    529 U.S. 803
    ,
    826 (2000) (emphasis added).
    - 20 -
    The declarations submitted by the Governor explained that it would
    be nearly impossible for Maine officials to verify the compliance
    of those claiming to have self-quarantined outside of Maine, while
    such verification would be appreciably easier if the requirement
    to self-quarantine had to be met by travelers once they arrived in
    Maine.9
    The plaintiffs do invoke Supreme Court of New Hampshire
    v. Piper, 
    470 U.S. 274
     (1985), to argue that the Governor's
    response on this score necessarily rests on the constitutionally
    impermissible assumption that non-Mainers are "less likely to
    comply with the law" than Mainers are.         See 
    id. at 285
    .     But, we
    do not agree that Piper provides any support for that contention.
    Piper   concerned   a   Privileges    and   Immunities    Clause
    challenge to a requirement that one had to be a New Hampshire
    resident to be admitted to that state's bar.          
    Id. at 275
    .      The
    United States Supreme Court explained that a requirement that non-
    residents attend classes in New Hampshire on New Hampshire law
    would be a less restrictive means of ensuring their knowledge of
    the local law remained fresh and, on that basis, struck down the
    9  We also note that, absent the travelers self-
    quarantining at the border just before entering Maine, it is hard
    to see how the plaintiffs' proposal would be equally effective at
    preventing potentially infected individuals from interacting with
    others inside Maine. After all, any quarantine undertaken before
    entering Maine would be rendered ineffective if a traveler
    interacts with other individuals while en route -- and before
    arriving -- to Maine's borders.
    - 21 -
    discriminatory residency requirement for admission to the state's
    bar as "markedly overinclusive," while noting that the state could
    not properly justify that requirement on the ground that out-of-
    staters would be less willing to comply with a requirement to
    remain familiar with local rules and procedures than would New
    Hampshirites.       See 
    id.
     at 285 & n.19.
    Here, however, the less restrictive alternative that the
    plaintiffs propose would not permit Maine to monitor the in-state
    behavior of those coming from elsewhere, as the less restrictive
    alternative identified in Piper would have permitted New Hampshire
    to   have   done.      Rather,   the   plaintiffs'     proposed    alternative
    contemplates        travelers    self-quarantining       outside       of    Maine
    altogether.    Thus, the Governor's explanation of the problem with
    that alternative does not rest on any assumption about travelers
    into Maine being less law-abiding than those who never leave Maine.
    The plaintiffs next point to the fact that the positivity
    rates of infection of those tested for the virus in certain states
    with less stringent requirements to self-quarantine were "either
    similar to or better than Maine."          They contend that the stricter
    self-quarantine       requirement   that     EO   34   imposed   was    no   more
    effective than the less stringent ones that these other states
    implemented,    thereby     demonstrating     that     less   restrictive     but
    equally effective (or, at least, equally ineffective) means of
    slowing the spread of the virus were available.
    - 22 -
    But, even if a comparison of the positivity rates in
    test   results   across   states   is   itself    apples-to-apples,10   the
    plaintiffs do not address the distinctions between those states
    and Maine in terms of health care system capacity and population
    surges from tourism.       They fail as well to explain why later
    outcomes in test results suffice to show what is relevant here --
    namely, that earlier responses were undertaken when it was evident
    (as opposed to sharply disputed) that less restrictive ones would
    prove to be as efficacious.         A city that calls out extra snow
    removal crews to respond to a blizzard has not overreacted if the
    ensuing storm overwhelms its extraordinary response just because
    the neighboring town that gambled the storm would never come and
    so made no special effort to combat it was overwhelmed by the
    snowfall as well.     We must judge the response based on what was
    known at the time and not in hindsight.          See Cooper v. Harris, 
    137 S. Ct. 1455
    , 1464 (2017) (explaining that governmental action does
    not fail a narrow tailoring requirement simply because certain
    measures "may prove, in perfect hindsight, not to have been
    needed").
    10
    The plaintiffs are comparing the percentage of COVID-
    19 tests that are coming back positive in a given jurisdiction
    over a particular time period (usually a seven-day average). These
    rates can vary widely not only over time, as a pandemic runs its
    course, but also due to factors such as, for example, the accuracy
    and availability of testing and whether asymptomatic persons (or
    only overtly ill ones) are frequently tested.
    - 23 -
    In a final effort to demonstrate a likelihood of success
    on the merits, the plaintiffs try to paint EO 34's self-quarantine
    requirement as an impermissible attempt by Maine "to effectively
    isolate itself from the rest of the Nation" and to "shift[] the
    burden of dealing with United States citizens afflicted with COVID-
    19   to   other   states."   The   plaintiffs   here   rely   on   City    of
    Philadelphia v. New Jersey, 
    437 U.S. 617
     (1978), in which the
    Supreme Court invalidated New Jersey's ban on importing waste that
    originated in other states as an "impermissible . . . effort[] by
    one State to isolate itself in the stream of interstate commerce
    from a problem shared by all."      
    Id. at 618, 629
    ; see also Edwards,
    
    314 U.S. at 173-74
     ("The Constitution was framed . . . upon the
    theory that the peoples of the several states must sink or swim
    together, and that in the long run prosperity and salvation are in
    union and not division" (quoting Baldwin v. Seelig, 
    294 U.S. 511
    ,
    523 (1935))).
    But, rather than suggesting that Maine was trying to
    "isolate"    itself   from   a   "problem   shared   by   all,"    City    of
    Philadelphia, 
    437 U.S. at 629
    , the record suffices to demonstrate
    that Maine was attempting to solve a common problem by means of a
    familiar solution.      This virus, by its nature, thrives on human
    contact, and no less central an authority than the U.S. Centers
    for Disease Control and Prevention has recommended that persons
    distance themselves from others and avoid unnecessary travel.             See
    - 24 -
    Domestic   Travel   During   the     COVID-19   Pandemic,   U.S.   CDC,
    https://www.cdc.gov/coronavirus/2019-ncov/travelers/travel-
    during-covid19.html (last visited Jan. 15, 2021).     Tellingly, City
    of Philadelphia itself noted that "quarantine laws," as a special
    category, are "repeatedly upheld even though they appear to single
    out interstate [activity] for special treatment" -- explaining
    that, in cases of viral outbreak, the very act of "movement [can]
    risk[] contagion and other evils."      
    437 U.S. at 628-29
    .
    IV.
    The District Court correctly held that the plaintiffs
    failed to demonstrate a likelihood of success on the merits of
    their right-to-travel claim.   We thus affirm the District Court's
    refusal to enter the requested preliminary injunction.
    - 25 -