United States v. Mark Steven Elk Shoulder ( 2012 )


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  •                     FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    UNITED STATES OF AMERICA,                      No. 10-30072
    Plaintiff-Appellee,                D.C. No.
    v.                              1:09-cr-00023-
    MARK STEVEN ELK SHOULDER,                           JDS-1
    Defendant-Appellant.
            OPINION
    Appeal from the United States District Court
    for the District of Montana
    Jack D. Shanstrom, Senior District Judge, Presiding
    Submitted June 1, 2012*
    Portland, Oregon
    Filed October 5, 2012
    Before: A. Wallace Tashima, Carlos T. Bea, and
    Sandra S. Ikuta, Circuit Judges.
    Opinion by Judge Ikuta
    *The panel unanimously concludes this case is suitable for decision
    without oral argument. See Fed. R. App. P. 34(a)(2).
    12119
    12122          UNITED STATES v. ELK SHOULDER
    COUNSEL
    Lisa J. Bazant, Billings, Montana, for the appellant.
    Marcia Hurd, Office of the United States Attorney, Billings,
    Montana, for the appellee.
    OPINION
    IKUTA, Circuit Judge:
    This appeal challenges the constitutionality of certain key
    provisions of the Sex Offender Registration and Notification
    Act (SORNA). Pub. L. 109-248, Tit. I, 
    120 Stat. 590
     (2006)
    (codified in scattered sections of the U.S.C.). Defendant Mark
    Steven Elk Shoulder was prosecuted under 
    18 U.S.C. § 2250
    (a) for failing to comply with the sex offender registra-
    tion requirements set forth in 
    42 U.S.C. § 16913
    . He now
    argues that his conviction was invalid, because SORNA vio-
    lates the Ex Post Facto Clause and the Due Process Clause,
    and because Congress lacked the constitutional authority to
    UNITED STATES v. ELK SHOULDER                       12123
    enact SORNA. We reject these constitutional challenges, and
    affirm the judgment of the district court.
    I
    SORNA was enacted in response to “Congress’ awareness
    that pre-[SORNA] registration law consisted of a patchwork
    of federal and 50 individual state registration systems.” Reyn-
    olds v. United States, 
    132 S. Ct. 975
    , 978 (2012) (citing 
    73 Fed. Reg. 38045
     (2008)). SORNA sought to improve the uni-
    formity and effectiveness of those systems by, among other
    things, “creating federal criminal sanctions applicable to those
    who violate the Act’s registration requirements.” 
    Id.
     To effec-
    tuate this goal, SORNA’s registration requirement, 
    42 U.S.C. § 16913
    , requires all state and federal sex offenders, as defined,1
    to “register, and keep the registration current, in each jurisdic-
    tion where the offender” resides, works, or goes to school.2 A
    person who fails to register as required by § 16913 may be
    criminally prosecuted under 
    18 U.S.C. § 2250
    (a). This provi-
    sion requires the government to prove that the defendant: (1)
    is required to register under SORNA, (2) is a “sex offender”
    as defined due to a conviction under federal law (or the law
    of certain other listed jurisdictions) or a person who “travels
    in interstate or foreign commerce, or enters or leaves, or
    1
    
    42 U.S.C. § 16911
    (1) provides: “The term ‘sex offender’ means an
    individual who was convicted of a sex offense.” The term “sex offense”
    is defined in § 16911(5)(A)(i) to include: “a criminal offense that has an
    element involving a sexual act or sexual contact with another.”
    2
    
    42 U.S.C. § 16913
    (a) provides:
    A sex offender shall register, and keep the registration current, in
    each jurisdiction where the offender resides, where the offender
    is an employee, and where the offender is a student. For initial
    registration purposes only, a sex offender shall also register in the
    jurisdiction in which convicted if such jurisdiction is different
    from the jurisdiction of residence.
    12124              UNITED STATES v. ELK SHOULDER
    resides in, Indian country” and, (3) knowingly failed to regis-
    ter or update a registration as required by SORNA.3
    These SORNA provisions provide the backdrop to the facts
    of this case. In 1991, Elk Shoulder was convicted in a federal
    district court in Montana of sexual abuse of a six-year-old
    child in violation of 
    18 U.S.C. § 2241
    (c).4 Elk Shoulder was
    sentenced to 172 months in prison, followed by five years
    supervised release. When Elk Shoulder was released in
    December 2003, officials informed him that he was required
    to register as a sex offender under Montana law. He registered
    in Yellowstone County, Montana, where he signed and ini-
    tialed the state’s “Sexual and Violent Offender Registration
    Form.” By doing so, Elk Shoulder acknowledged that under
    state law, he was required to maintain a current and updated
    3
    
    18 U.S.C. § 2250
    (a) states:
    (a) In General.— Whoever—
    (1) is required to register under the Sex Offender Registra-
    tion and Notification Act;
    (2)   (A) is a sex offender as defined for the purposes of the
    Sex Offender Registration and Notification Act by rea-
    son of a conviction under Federal law (including the
    Uniform Code of Military Justice), the law of the Dis-
    trict of Columbia, Indian tribal law, or the law of any
    territory or possession of the United States; or
    (B) travels in interstate or foreign commerce, or enters
    or leaves, or resides in, Indian country; and
    (3) knowingly fails to register or update a registration as
    required by the Sex Offender Registration and Notification
    Act;
    shall be fined under this title or imprisoned not more than 10
    years, or both.
    4
    At the time of Elk Shoulder’s conviction, § 2241(c) provided that
    “[w]hoever, in the special maritime and territorial jurisdiction of the
    United States or in a Federal prison, knowingly engages in a sexual act
    with another person who has not attained the age of 12 years, or attempts
    to do so, shall be fined under this title, imprisoned for any term of years
    or life, or both.” 
    18 U.S.C. § 2241
     (1992).
    UNITED STATES v. ELK SHOULDER              12125
    registration and that his duty to register would continue for
    the rest of his life, even after the expiration of probation or
    parole.
    Weeks later, in February 2004, Elk Shoulder violated the
    terms of his supervised release and was sentenced to thirty
    months in prison, followed by thirty months of supervised
    release. Upon his release from prison a second time in April
    2006, he again registered as a sex offender in Yellowstone
    County. SORNA was enacted three months later. In August
    2006, Elk Shoulder again violated the terms of his supervised
    release and was sentenced to another twenty-four months in
    prison.
    After his release from prison a third time in May 2008, Elk
    Shoulder moved around Montana, living at various times in
    the Northern Cheyenne Indian Reservation, Bozeman, Lame
    Deer, Billings, and Wolf Point. He did not register as a sex
    offender in any of these locales.
    In 2009, Elk Shoulder was indicted under 
    18 U.S.C. § 2250
    (a) for violating the SORNA registration requirements
    in 
    42 U.S.C. § 16913
    . Before trial, Elk Shoulder brought two
    motions to dismiss the indictment. In the first, he asserted that
    SORNA’s registration provision exceeded Congress’s author-
    ity under the Commerce Clause. In the second, he claimed
    that the retroactive application of these provisions violated the
    Ex Post Facto Clause. The district court denied both motions.
    After a bench trial, the court found Elk Shoulder guilty
    beyond a reasonable doubt. He was sentenced to a term of
    thirty months imprisonment, to be followed by five years
    supervised release.
    On appeal, Elk Shoulder argues that the district court erred
    in rejecting his constitutional challenges to SORNA. We
    address each of his arguments in turn.
    12126              UNITED STATES v. ELK SHOULDER
    II
    We first consider Elk Shoulder’s argument that SORNA’s
    statutory scheme for requiring sex offenders to register and
    criminalizing certain failures to register violates the Ex Post
    Facto Clause.
    [1] The Constitution provides: “No . . . ex post facto Law
    shall be passed.” U.S. Const. art. I § 9, cl. 3. As the Supreme
    Court has succinctly explained, “[l]egislatures may not retro-
    actively alter the definition of crimes or increase the punish-
    ment for criminal acts.” Collins v. Youngblood, 
    497 U.S. 37
    ,
    43 (1990); see also United States v. Elkins, 
    683 F.3d 1039
    ,
    1044 (9th Cir. 2012) (holding that the Ex Post Facto Clause
    “bars the enactment of any law that imposes a punishment for
    an act which was not punishable at the time it was committed;
    or imposes additional punishment to that then prescribed.”)
    (quoting Russell v. Gregoire, 
    124 F.3d 1079
    , 1083 (9th Cir.
    1997) (internal quotation marks omitted).
    Elk Shoulder asserts that SORNA’s registration require-
    ment constitutes an additional punishment for his federal sex
    offense, which he committed in 1991. Because SORNA was
    not enacted until 2006, he argues that the Ex Post Facto
    Clause prohibited Congress from applying the registration
    requirement to him.5
    [2] Elk Shoulder’s argument is foreclosed by our recent
    decision in United States v. Elkins. 
    683 F.3d 1039
    . In Elkins,
    a defendant who had been convicted of a sex offense under
    5
    To the extent Elk Shoulder argues that 
    18 U.S.C. § 2250
     also violates
    the Ex Post Facto Clause, his claim is meritless. Elk Shoulder’s criminal
    conduct (failing to register following his 2008 release from prison)
    occurred after SORNA was enacted in July 2006. Therefore, a conviction
    under § 2250 cannot violate the Ex Post Facto clause in Elk Shoulder’s
    case. Cf. Miller v. Florida, 
    482 U.S. 423
    , 430 (1987) (“A law is retrospec-
    tive if it changes the legal consequences of acts completed before its effec-
    tive date.” (internal quotation marks omitted)).
    UNITED STATES v. ELK SHOULDER                     12127
    Washington law in 1994 failed to register when he moved
    from Washington to California in 2010, and was indicted
    under § 2250. Id. at 1041-42. Elkins filed a motion to dismiss
    the indictment arguing, among other things, that the require-
    ment to register violated the Ex Post Facto Clause in his case
    because it was punitive in nature and was based on a prior
    conviction that occurred before SORNA was enacted. Id. at
    1043-44. We concluded that SORNA’s registration require-
    ment was not punitive in nature, and therefore did not violate
    Elkins’s constitutional rights. Id. at 1045. We based this con-
    clusion on Smith v. Doe, 
    538 U.S. 84
     (2003), in which the
    Supreme Court applied a five factor test,6 and concluded that
    Alaska’s Sex Offender Registration Act, which is similar to
    SORNA in all material ways, was not punitive in nature. 
    Id. at 105-06
    . We thus rejected the ex post facto challenge to
    SORNA, and in doing so joined all of our sister circuits that
    have considered the issue. Elkins, 683 F.3d at 1045.7 Because
    Elk Shoulder also argues that SORNA’s registration require-
    ment cannot be applied to him because it is punitive in nature,
    Elkins’s reasoning is equally applicable to Elk Shoulder.
    6
    The Court’s analysis focused on “whether, in its necessary operation,
    the regulatory scheme: [1] has been regarded in our history and traditions
    as a punishment; [2] imposes an affirmative disability or restraint; [3] pro-
    motes the traditional aims of punishment; [4] has a rational connection to
    a nonpunitive purpose; or [5] is excessive with respect to this purpose.”
    Smith, 
    538 U.S. at 97
    .
    7
    See, e.g., United States v. DiTomasso, 
    621 F.3d 17
    , 25 (1st Cir. 2010),
    abrogated on other grounds by Reynolds, 
    132 S. Ct. 975
    ; United States v.
    Guzman, 
    591 F.3d 83
    , 94 (2d Cir. 2010); United States v. Shenandoah,
    
    595 F.3d 151
    , 158-59 (3d Cir. 2010), abrogated on other grounds by
    Reynolds, 
    132 S. Ct. 975
    ; United States v. Gould, 
    568 F.3d 459
    , 466 (4th
    Cir. 2009); United States v. Young, 
    585 F.3d 199
    , 202-06 (5th Cir. 2009);
    United States v. Felts, 
    674 F.3d 599
    , 605-06 (6th Cir. 2012); United States
    v. Leach, 
    639 F.3d 769
    , 772-73 (7th Cir. 2011); United States v. May, 
    535 F.3d 912
    , 919-20 (8th Cir. 2008), abrogated on other grounds by Reyn-
    olds, 
    132 S. Ct. 975
    ; United States v. Hinckley, 
    550 F.3d 926
    , 935-38
    (10th Cir. 2008), abrogated on other grounds by Reynolds, 
    132 S. Ct. 975
    ;
    United States v. W.B.H., 
    664 F.3d 848
    , 852-60 (11th Cir. 2011).
    12128           UNITED STATES v. ELK SHOULDER
    Despite this precedent, Elk Shoulder argues that the Court’s
    analysis in Smith “no longer hold[s] true in today’s society,”
    and the purpose and effect of SORNA’s registration require-
    ment is punitive in nature. Elk Shoulder focuses on the
    Supreme Court’s holding that the Alaska registration statute
    does not resemble shaming punishments of the colonial period
    (the first factor of Doe’s five-factor test), and that there was
    “no evidence that [the registration requirement] has led to
    substantial occupational or housing disadvantages for former
    sex offenders that would not have otherwise occurred through
    the use of routine background checks by employers and land-
    lords.” 
    538 U.S. at 100
     (the second factor). According to Elk
    Shoulder, today SORNA’s registration requirement imposes
    significant hardships on offenders, who are “held to public
    ridicule by community members,” and face difficulty finding
    and maintaining both employment and housing. He notes that
    local newspapers frequently maintain interactive maps of the
    registered residences of sex offenders, and cites “reports of
    incidents of citizens standing on street corners bearing signs
    with the names and addresses of offenders blaz[o]ned across
    the front.”
    This argument fails. Most important, we have recently reaf-
    firmed the nonpunitive nature of SORNA in Elkins, which we
    are bound to follow. Miller v. Gammie, 
    335 F.3d 889
    , 899
    (9th Cir. 2003) (en banc). Further, Smith v. Doe contemplated
    that information from the Alaska sex registration statute
    would be available on the internet, but determined that such
    internet notification was nonpunitive because its principal
    effect was to “inform the public for its own safety, not to
    humiliate.” 583 U.S. at 99. The Court further noted that there
    was no evidence that the Alaska act had “led to substantial
    occupational or housing disadvantages that would not have
    otherwise occurred through the use of routine background
    checks by employers and landlords.” Id. at 100. Because
    “only the clearest proof will suffice to override legislative
    intent and transform what has been denominated a civil rem-
    edy into a criminal penalty,” id. at 92 (internal citation and
    UNITED STATES v. ELK SHOULDER             12129
    quotation marks omitted), Elk Shoulder’s conclusory state-
    ments and handful of anecdotal examples cannot carry the
    heavy burden of showing substantial changes in society that
    would require us to revisit the Supreme Court’s conclusion.
    [3] We thus reject Elk Shoulder’s argument that applica-
    tion of the SORNA registration requirements to him on the
    basis of his earlier conviction violates the Ex Post Facto
    Clause.
    III
    [4] We next turn to Elk Shoulder’s arguments that
    SORNA’s registration requirement violates his rights under
    the Fifth Amendment, which bars the federal government
    from depriving persons of “life, liberty, or property, without
    due process of law.” U.S. Const. amend. V.
    Elk Shoulder first asserts that he was deprived of his right
    to due process because it was impossible for him to comply
    with SORNA. As noted above, in order to convict Elk Shoul-
    der under § 2250(a), the government had to prove that Elk
    Shoulder knowingly failed “to register or update a registration
    as required by” SORNA. § 2250(a)(3) (emphasis added). Elk
    Shoulder points out that SORNA required states to adopt the
    new procedures for sex offender registries established by the
    Act, or lose part of their federal funding. 
    42 U.S.C. §§ 16924
    (a), 16925. Elk Shoulder argues that, because Mon-
    tana had not yet conformed its sex offense registry to
    SORNA’s requirements, it was impossible for him to register
    “as required by” SORNA.
    [5] We have previously rejected this argument, both in
    United States v. George, 
    625 F.3d 1124
    , 1128-29 (9th Cir.
    2010), vacated on other grounds, 
    672 F.3d 1126
     (9th Cir.
    2012), and in Elkins, 683 F.3d at 1046. As we stated in Elkins,
    “the federal government’s prosecution of an alleged violation
    of SORNA is not dependent on the individual state’s imple-
    12130           UNITED STATES v. ELK SHOULDER
    mentation of the administrative portion of SORNA.” Elkins,
    683 F.3d at 1046; accord id. at 1046 n.9 (the “duty to register
    in a state registry is independent of a state’s degree of imple-
    mentation of SORNA.” (quoting Felts, 
    674 F.3d at 603
    )); see
    also Guzman, 
    591 F.3d at 93
    ; Gould, 
    568 F.3d at 464
    .
    Because Elk Shoulder could have registered with the State of
    Montana’s registry, and because this would have allowed him
    to register “as required by” SORNA, it was not impossible for
    Elk Shoulder to meet the requirements of § 2250(a). Thus,
    this case presents no impossibility-based due process prob-
    lems.
    [6] Second, Elk Shoulder asserts that he did not receive
    notice that failure to register as a sex offender would violate
    SORNA, and therefore he did not receive notice sufficient to
    comply with the Due Process Clause. This argument is merit-
    less. In order to convict a defendant under § 2250(a), “the
    government [must] prove that a convicted sex offender knew
    of a registration requirement and knowingly failed ‘to register
    or update a registration.’ ” United States v. Crowder, 
    656 F.3d 870
    , 876 (9th Cir. 2011) (quoting § 2250(a)(3)). A SORNA
    defendant’s knowledge of his failure to “register or update a
    registration” as required by state law is sufficient to satisfy the
    “notice” requirement of the Due Process Clause. Elkins, 683
    F.3d at 1049-50; accord United States v. Brown, 
    586 F.3d 1342
    , 1351 (11th Cir. 2009) (“[W]e join our sister circuits in
    concluding that ‘notice of a duty to register under state law is
    sufficient to satisfy the Due Process Clause.” (internal quota-
    tion marks omitted)). The defendant need not know that the
    same failure also violates SORNA. Thus, because Elk Shoul-
    der received notice of his obligation to register under Mon-
    tana state law, he received all the notice the Due Process
    Clause requires.
    IV
    [7] Finally, Elk Shoulder argues that Congress lacks the
    Constitutional authority to punish his failure to register under
    UNITED STATES v. ELK SHOULDER                     12131
    SORNA. At issue is whether Congress has the authority to
    impose SORNA registration requirements on individuals who,
    like Elk Shoulder, are convicted of federal sex crimes.8
    “The Federal Government ‘is acknowledged by all to be
    one of enumerated powers.’ ” Nat’l Fed’n of Ind. Bus. (NFIB)
    v. Sebelius, 
    132 S. Ct. 2566
    , 2576 (2012) (quoting McCulloch
    v. Maryland, 17 U.S. (4 Wheat.) 316, 405 (1819)). No clause
    in Article I expressly authorizes Congress to impose registra-
    tion requirements on federal convicts such as Elk Shoulder.
    Nevertheless, the government argues that because Congress
    had authority to enact § 2241(c) (Elk Shoulder’s statute of
    conviction) under the Constitution’s Property Clause, U.S.
    Const., art. IV, § 3, cl. 2,9 Congress also had the authority to
    enact §§ 16913 and 2250(a) under the Necessary and Proper
    Clause, which empowers Congress “[t]o make all laws which
    shall be necessary and proper for carrying into Execution the
    foregoing Powers, and all other Powers vested by this Consti-
    tution in the Government of the United States,” U.S. Const.
    art. I, § 8, cl. 18.
    A
    The Supreme Court provided a framework for analyzing
    such arguments in United States v. Comstock, 
    130 S. Ct. 1949
    (2010). In Comstock, the Court upheld a civil commitment
    statute that allowed the government to detain, past their
    release dates, sexually dangerous individuals who were
    already in federal custody, as a valid use of Congress’s power
    8
    Because Elk Shoulder was convicted of a sex offense under federal
    law, we do not reach his argument that SORNA’s imposition of registra-
    tion requirements on sex offenders convicted under state law exceeded
    Congress’s power under the Commerce Clause.
    9
    “The Congress shall have Power to dispose of and make all needful
    Rules and Regulations respecting the Territory or other Property belong-
    ing to the United States; and nothing in this Constitution shall be so con-
    strued as to Prejudice any Claims of the United States, or of any particular
    State.” U.S. Const., art. IV, § 3, cl. 2.
    12132           UNITED STATES v. ELK SHOULDER
    under the Necessary and Proper Clause. Id. at 1954. In ana-
    lyzing this issue, the Court weighed five considerations, id. at
    1956, which (it was careful to explain), did not constitute a
    test to be satisfied, id. at 1965. As explained in more detail
    below, these considerations included whether the Congressio-
    nal enactment: (1) was rationally related to the implementa-
    tion of a constitutionally enumerated power; (2) was “a
    modest addition” to existing federal legislation; (3) was rea-
    sonably adapted to its ends; (4) accommodated state interests
    and state sovereignty; and (5) was not “too sweeping in
    scope,” and was linked to a constitutionally enumerated
    power in a manner that was not too attenuated. Id at 1956-65.
    Comstock’s analysis of these five factors is directly applica-
    ble to the SORNA registration statute.
    First, Comstock determined that the civil commitment stat-
    ute at issue in that case was rationally related to the constitu-
    tionally enumerated powers that authorized Congress to enact
    and enforce laws. Id. at 1956. The Court reasoned that
    because Congress had the power to “ensure the enforcement
    of federal criminal laws enacted in furtherance of its enumer-
    ated powers,” id. at 1958, it likewise “can cause a prison to
    be erected at any place within the jurisdiction of the United
    States,” and direct that it be used for the imprisonment of fed-
    eral criminals. Id. (quoting Ex parte Karstendick, 
    93 U.S. 396
    ,
    400 (1876)) (internal quotation marks omitted). Congress,
    “having enacted a prison system, can enact laws that seek to
    ensure that system’s safe and responsible administration.”
    Comstock, 
    130 S. Ct. at 1958
    . It may also seek to “ensure the
    safety of . . . those in the surrounding communities” with the
    enactment of further criminal laws. 
    Id.
     Each link in this chain,
    the Court explained, is rationally related to the underlying
    enumerated power; the powers authorizing the prisoners’ stat-
    utes of conviction. By extension, this gave Congress the
    authority to confine “mentally ill and sexually dangerous per-
    sons who are already in federal custody, even if doing so
    UNITED STATES v. ELK SHOULDER             12133
    detains them beyond the termination of their criminal sen-
    tence.” 
    Id. at 1961
    .
    [8] We apply Comstock’s analysis here. The parties do not
    dispute that Congress had the power to enact § 2241(c), Elk
    Shoulder’s crime of conviction, under the Property Clause.
    This constitutional authority gave Congress the power to
    enact laws to ensure the safety of the surrounding communi-
    ties by regulating and monitoring post-release behavior. See
    Comstock, 
    130 S. Ct. at 1958
    . SORNA’s registration require-
    ment, see § 16913, and the criminal penalties for the violation
    of the registration requirements, see § 2250, are rationally
    related to public safety, “which is advanced by alerting the
    public to the risk of sex offenders in their community,” Smith,
    
    538 U.S. at 102-03
    . Accordingly, SORNA was rationally
    related to an enumerated power.
    [9] Second, Comstock determined that the civil commit-
    ment statute was “a modest addition to a set of federal prison-
    related mental-health statutes that ha[d] existed for many dec-
    ades.” Id. at 1958, 1961. The same conclusion is applicable
    here. Requiring sex offenders to register and update their
    addresses is “a modest addition” to the federal government’s
    long history of regulating federal offenders after their release
    from incarceration through probation, parole and supervised
    release. See, e.g., Sentencing Reform Act of 1984, Pub. L.
    No. 98-473, 
    98 Stat. 1987
    ; Act of June 25, 1910, 
    36 Stat. 819
    (establishing parole for federal prisoners). Federal law has
    required states to maintain sex offender registration and com-
    munity notification systems since 1994. See Carr v. United
    States, 
    130 S. Ct. 2229
    , 2233 (2010). A registration require-
    ment “imposes the more minor condition of registration,”
    Smith, 
    538 U.S. at 104
    , compared to the custodial require-
    ments of parole, probation, and supervised release.
    [10] Third, Comstock held that the civil commitment stat-
    ute at issue was reasonably adapted to its ends. Among other
    things, “Congress could have reasonably concluded that fed-
    12134          UNITED STATES v. ELK SHOULDER
    eral inmates who suffer from a mental illness that causes them
    to have serious difficulty in refraining from sexually violent
    conduct, would pose an especially high danger to the public
    if released.” Comstock, 
    130 S. Ct. at 1961
     (internal citation
    and quotation marks omitted). Here, Congress’s decision to
    enact SORNA to enhance public safety by imposing a regis-
    tration requirement on convicted federal sex offenders and
    criminalizing the failure to register, is also “reasonably
    adapted to the attainment of a legitimate end,” 
    id. at 1957
    (internal quotation marks omitted), namely to “protect the
    public from sex offenders and offenders against children,” 
    42 U.S.C. § 16901
    , by improving the “patchwork of federal and
    . . . state registration systems” that pre-dated SORNA, Reyn-
    olds, 
    132 S. Ct. at
    978 (citing 
    73 Fed. Reg. 38045
    ). Congress
    determined that the deficiencies in the pre-SORNA systems
    “had enabled sex offenders to slip through the cracks” result-
    ing in some 100,000 “missing” sex offenders, and that
    SORNA’s comprehensive registries, public notification, infor-
    mation sharing and dissemination, and criminal enforcement
    penalties, Carr, 130 S. Ct. at 2240-41, are reasonable means
    for addressing this problem, see id., at 2238. Further, because
    SORNA registration requirements are imposed only on indi-
    viduals who were convicted of sexual offenses, it regulates
    only “those who by some preexisting activity bring them-
    selves within the sphere of federal regulation.” NFIB, 132 S.
    Ct. at 2592.
    [11] Fourth, Comstock determined that the civil commit-
    ment statute “properly accounts for state interests,” and does
    not “invade state sovereignty or otherwise improperly limit
    the scope of powers that remain with the States.” Id. at 1962
    (internal quotation marks omitted). SORNA likewise reason-
    ably accommodates state interests. Although Congress gave
    the states primary responsibility in supervising sex offenders,
    SORNA is applicable only to federal sex offenders, over
    whom the federal government has a “direct supervisory inter-
    est,” and those state offenders “who threaten the efficacy of
    the statutory scheme by traveling in interstate commerce,”
    UNITED STATES v. ELK SHOULDER             12135
    thus placing themselves outsides of the state’s reach. Carr,
    
    130 S. Ct. at 2238-39
    .
    Additionally, SORNA’s requirement that states implement
    SORNA-compliant registration and notification systems in
    order to receive certain funds, see 
    42 U.S.C. § 16925
    , does
    not improperly invade state interests. A state that fails to
    “substantially implement” the requirement of SORNA may
    lose ten percent of federal funding under the Omnibus Crime
    Control and Safe Streets Act of 1968. § 16925(a). This finan-
    cial loss is a “relatively mild encouragement” rather than “a
    gun to the head.” NFIB, 130 S. Ct. at 2604 (striking down leg-
    islation conditioning “over 10 percent of a State’s overall
    budget” on state expansion of Medicaid programs). Indeed, as
    of July 27, 2011, the statutory deadline for jurisdictions to
    implement SORNA, only 14 states had done so. See Melissa
    Hamilton, Public Safety, Individual Liberty, and Suspect Sci-
    ence: Future Dangerousness Assessments and Sex Offender
    Laws, 
    83 Temp. L. Rev. 697
    , 706 n.53 (2011).
    [12] Fifth, Comstock held that the links between Con-
    gress’s enumerated powers and the federal civil commitment
    statute “are not too attenuated.” 130 S. Ct. at 1963. The Court
    rejected the argument that “when legislating pursuant to the
    Necessary and Proper Clause, Congress’s authority can be no
    more than one step removed from a specifically enumerated
    power.” Id. Rather, the Court explained, its precedents allow
    for many links in the chain. Here, the links between Con-
    gress’s enumerated powers and SORNA are no more attenu-
    ated than those in Comstock. It is a small step from
    Congress’s power to enact laws, criminalize their violation,
    place the violators in custody, and protect the public from fed-
    eral convicts even after release, see id. at 1964-65, to requir-
    ing federal convicts who may be dangerous to the public to
    provide information regarding their residences, and punishing
    those who fail to do so.
    Further, Comstock concluded that the civil commitment
    statute was not “too sweeping in scope.” Id. at 1963. The
    12136             UNITED STATES v. ELK SHOULDER
    SORNA registration requirements are likewise not “too
    sweeping in scope.” Contrary to Elk Shoulder’s assertion that
    authorization of lifelong registration requirements would
    grant a “general police power” to Congress, the requirement
    to register is not nearly as significant a burden as the indefi-
    nite detention authorized in Comstock. See id. at 1954-55.
    Although the Necessary and Proper Clause provides no justi-
    fication for laws effecting “a substantial expansion of federal
    authority,” NFIB, 130 S. Ct. at 2592, SORNA’s registration
    requirement is “narrow in scope” and “incidental to the exer-
    cise” of enumerated powers. Id. at 2592 (opinion of C.J. Rob-
    erts) (citations and internal quotation marks omitted).
    [13] Accordingly, we join the Tenth Circuit Court of
    Appeals in concluding that SORNA’s registration require-
    ment, § 16913, and by extension, the statute penalizing failure
    to register, § 2250, were within the scope of Congress’s
    authority under the Necessary and Proper Clause. See United
    States v. Yelloweagle, 
    643 F.3d 1275
    , 1277 (10th Cir. 2011)
    (assuming the constitutionality of the registration provision,
    and concluding that § 2250 was “a valid exercise of congres-
    sional authority under the Necessary and Proper Clause.”);
    United States v. Carel, 
    668 F.3d 1211
    , 1217 (10th Cir. 2011)
    (upholding the constitutionality of § 16913 “[b]ased on Con-
    gress’s authority to enact [defendant’s federal] statute of con-
    viction” and the Necessary and Proper Clause).
    B
    We recognize that the Fifth Circuit has disagreed with this
    conclusion, and held that Congress did not have the authority
    to require federal convicts who had “been unconditionally
    released from federal custody or supervision” before SORNA
    was enacted to comply with its registration requirements.10
    10
    Because Elk Shoulder was serving a federally imposed term of super-
    vised release when SORNA was enacted in July 2006, Kebedeaux’s spe-
    cific holding is not applicable here. We nevertheless consider the logic of
    UNITED STATES v. ELK SHOULDER                    12137
    See United States v. Kebodeaux, 
    687 F.3d 232
    , 244, 253 (5th
    Cir. 2012). The Fifth Circuit reasoned that “[a]fter the federal
    government has unconditionally let a person free, [ ] the fact
    that he once committed a crime is not a jurisdictional basis for
    subsequent regulation and possible criminal prosecution.” Id.
    at 234-35. In effect, the Fifth Circuit deemed the links
    between SORNA’s registration requirement and an enumer-
    ated Article I power to be per se too attenuated when applied
    to federal convicts already released from federal custody. The
    Fifth Circuit distinguished Comstock because the civil com-
    mitment statute in that case applied to prisoners still in federal
    custody. Id. at 236.
    We disagree. The Supreme Court has “made clear that, in
    determining whether the Necessary and Proper Clause grants
    Congress the legislative authority to enact a particular federal
    statute, we look to see whether the statute constitutes a means
    that is rationally related to the implementation of a constitu-
    tionally enumerated power.” Comstock, 
    130 S.Ct. at 1956
    .
    Nothing in this jurisprudence supports Kebodeaux’s per se
    rule that a Congressional enactment cannot be rationally
    related to implementing an enumerated power if it applies to
    federal convicts who have been released from custody before
    the date of the enactment. Rather, as explained above, a regis-
    tration requirement aimed at informing the public of the iden-
    tity and location of individuals convicted of sex offenses is
    reasonably related to Congress’s authority to ensure the safety
    of the public, which in turn flows from its authority to enact
    Kebedeaux because, while SORNA was enacted while Elk Shoulder was
    on supervised release, SORNA’s registration requirements did not become
    applicable to Elk Shoulder until after his unconditional release from
    prison in May 2008. See Reynolds, 
    132 S. Ct. at 978
     (holding that
    SORNA’s registration requirements “do not apply to pre-Act offenders
    until the Attorney General so specifies”); United States v. Valverde, 
    628 F.3d 1159
    , 1160 (9th Cir. 2010) (holding that the Attorney General did not
    validly specify that SORNA’s registration requirements were retroactive
    until August 1, 2008.).
    12138           UNITED STATES v. ELK SHOULDER
    and enforce criminal laws. Indeed, in Smith v. Doe, the
    Supreme Court relied on this reasonable relation between a
    registration requirement and a state’s safety objectives in con-
    cluding that a state could constitutionally apply its sex
    offender registration statute to a person who had been
    released from custody before the statute was enacted. See 
    538 U.S. at 102-03
     (agreeing with the appellate court that the stat-
    ute had the “legitimate nonpunitive purpose of public safety,
    which is advanced by alerting the public to the risk of sex
    offenders in their communit[y].”) (internal quotation marks
    omitted, alteration in original). While Comstock may be dis-
    tinguishable on its facts, we see no reasoned basis for holding
    that a law authorizing the federal government to exercise
    indefinite civil custody over former federal prisoners even
    after they have served their sentences, Comstock, 
    130 S. Ct. at 1979
     (Thomas, J., dissenting), has less of a rational rela-
    tionship to an enumerated power than an enactment requiring
    such former federal prisoners to provide registration informa-
    tion, even after they have been released from custody.
    Because we reject the Fifth Circuit’s conclusion that Con-
    gress cannot “reassert jurisdiction over someone it had long
    ago unconditionally released from custody,” Kebodeaux, 687
    F.3d at 238, a proposition for which the Fifth Circuit provided
    no support, we disagree with its analysis of the Comstock con-
    siderations, which it based almost exclusively on that conclu-
    sion.
    V
    [14] Because SORNA violates neither the Ex Post Facto
    Clause nor Elk Shoulder’s constitutional right to due process,
    and because Congress acted within its enumerated powers in
    enacting it, we affirm the judgment of the district court.
    AFFIRMED.