Michael Ray Husted challenges his conviction under 18 U.S.C. § 2250, part of the Sex Offender Registration and Notification Act (“SORNA” or “the Act”), for failure to register as a sex offender after traveling in interstate commerce. He makes four arguments on appeal: (1) SORNA does not apply to him because his interstate travel was complete before the Act became effective; (2) SORNA does not apply to him because Missouri state law did not require him to register; (3) if SORNA does apply to him, it violates the Ex Post Facto Clause of the Constitution; and (4) SOR-NA is not within Congress’s Commerce Clause authority. We conclude that SOR-NA cannot apply to a defendant whose interstate travel is complete prior to the effective date of the Act. Exercising jurisdiction under 28 U.S.C. § 1291, we reverse Husted’s conviction.
I
Husted was convicted of aggravated criminal sexual abuse of a child on March 22, 1993, in Hancock, Illinois. Under Illinois law, Husted was required to register as a sex offender and to annually update his registration with Illinois authorities. In April 2005, he failed to update his registration with the Illinois sex offender registry, so his registration obligation was extended for an additional ten years. In January 2006, Husted informed the Hancock County Sheriffs Department in Illinois that he was moving to Enid, Oklahoma. Husted left Illinois for Oklahoma shortly thereafter.
Husted registered as a sex offender with Oklahoma authorities on February 8, 2006, and updated his registration on March 15, 2006. He did not thereafter update his registration with Oklahoma authorities and, as a result, fell out of compliance with Oklahoma law. On February 8, 2007, Oklahoma officials mailed a letter to Hust-ed at his Enid address informing him that he was out of compliance with state registration requirements. Because Husted no longer lived at his recorded address, the letter was returned six days later. In response, officials from the Oklahoma Department of Corrections notified the United States Marshals Service that Husted was in violation of Oklahoma law and that his whereabouts were unknown. Officers from the Enid Police Department then visited Husted’s last known address to in *1242 vestigate and learned that Husted had moved in April 2006.
On April 6, 2007, a Deputy United States Marshal contacted the police department in Lebanon, Missouri to determine if Husted had moved there. The Lebanon Police Department reported that Husted had been arrested on unrelated charges on March 6, 2007, while living in Lebanon. At no point did Husted inform Oklahoma officials of his move to Missouri, nor did he register with Missouri officials upon his arrival in Lebanon.
It is not clear from the record precisely when Husted moved from Oklahoma to Missouri, but it is undisputed that he did so prior to July 27, 2006, the effective date of SORNA. Moreover, there is no indication from the record that Husted ever left Missouri after July 27, 2006, and the government does not argue to the contrary. As the government conceded at oral argument, on the record before us, Husted’s interstate travel was complete prior to SORNA’s effective date.
In April 2007, an Oklahoma grand jury indicted Husted with one count of failure to register as a sex offender, in violation of SORNA, specifically 18 U.S.C. § 2250. 1 The indictment alleged that Husted had failed to properly “update and register as a sex offender” in Missouri after traveling in interstate commerce from Oklahoma. Husted moved to dismiss his indictment, raising the same four arguments he has preserved on appeal: (1) SORNA did not apply to him because his interstate travel was complete prior to the Act’s effective date; (2) Missouri law did not require Husted to register as a sex offender, so his failure to register in Missouri could not serve as the basis for a SORNA violation; (3) applying SORNA to Husted violated the Ex Post Facto Clause of the Constitution; and (4) SORNA exceeded the scope of Congress’s Commerce Clause authority. The district court denied Husted’s motion to dismiss but, apparently concerned about a potential Ex Post Facto Clause violation, amended the indictment to reflect July 27, 2006 — the effective date of SORNA — as the date the offense commenced.
Husted pleaded guilty to the indictment, reserving the right to appeal the denial of his motion to dismiss. The district court sentenced Husted to 18 months’ imprisonment as well as five years of supervised release. Appeal was then taken.
II
Before reaching any constitutional issues, we must first decide whether 18 U.S.C. § 2250(a)(2)(B) applies to a defendant whose interstate travel is complete prior to July 27, 2006, the date SORNA became effective. We conclude that it does not.
We review issues of statutory interpretation de novo, accepting the district court’s factual determinations unless they are clearly erroneous.
United States v. Manning,
A
We begin our analysis, as we must, with the text of SORNA.
E.g., Duncan v. Walker,
SORNA provides:
a) In general. — Whoever—
(1) is required to register under the Sex Offender Registration and Notification Act;
(2)(A) is a sex offender as defined for the purposes of the Sex Offender Registration and Notification Act by reason of a conviction under Federal law (including the Uniform Code of Military Justice), the law of the District 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. 18 U.S.C. § 2250 (emphasis added). Thus, in order to convict a defendant under § 2250 using the first clause of subsection (a)(2)(B), the government must prove that he: (1) is required to register under SOR-NA; 2 (2) travels in interstate commerce; 3 and (3) knowingly fails to register or update registration as required by SORNA. We need only address the second element in order to resolve this appeal. Husted argues that SORNA does not apply to him because the term “travels” only covers individuals who travel in interstate commerce after SORNA’s effective date. By contrast, the government contends that the term “travels” encompasses individuals who travel in interstate commerce at any point after they have been convicted of a qualifying sex offense. We agree with Husted.
As noted, § 2250(a)(2)(B) applies to whomever
“travels
in interstate ... commerce” (emphasis added). Congress’s use of the present tense form of the verb “to travel” indicates that SORNA’s coverage is limited to those individuals who travel in interstate commerce after the Act’s effective date.
4
See
1 U.S.C. § 1 (directing courts that, unless context indicates otherwise, “words used in the present tense include the future as well as the present”);
United States v. Wilson,
Additionally, Congress’s use of the present tense throughout § 2250(a)(2)(B) confirms our interpretation of the term “travels.”
See United States v. Bishop,
United States v. Jackson,
B
Despite SORNA’s plain meaning, the government argues that we should nonetheless interpret the statute to reach defendants who traveled interstate before the Act’s effective date because to do otherwise would reach an absurd result. The government attempts to rely on the absurdity doctrine articulated in
Green v. Bock Laundry Machine Co.,
We must bear in mind, however, that the absurdity doctrine applies to unambiguous statutes, such as § 2250(a)(2)(B), in only the most extreme of circumstances.
See Barnhart v. Sigmon Coal Co.,
[I]f, in any case, the plain meaning of a provision, not contradicted by any other provision in the same instrument, is to be disregarded, because we believe the framers of that instrument could not intend what they say, it must be one in which the absurdity and injustice of applying the provision to the case, would be so monstrous, that all mankind would, without hesitation, unite in rejecting the application.
Sturges v. Crowninshield,
The government also wishes that we read the broad purposes in the preamble of the Adam Walsh Act to contradict the plain meaning of § 2250(a)(2)(B). When a statute is unambiguous, however, we must apply its plain meaning except in the rarest of cases; after all, there can be no greater statement of legislative intent than an unambiguous statute itself.
Holland v. Dist. Court,
C
Supreme Court case law, as well as ours, clarifies that “[a] statute may not be applied retroactively ... absent a clear indication from Congress that it intended such a result.”
INS v. St. Cyr,
It is asserted by the government that Congress has spoken to the retroactivity issue, and that St. CyPs admonition against retroactivity therefore does not apply. We disagree. We are directed to the Department of Justice’s Interim Rule applying SORNA “to all sex offenders, including sex offenders convicted of the offense for which registration is required prior to the enactment of that Act.” 28 C.F.R. § 72.3. Contrary to the government’s contention, however, this Rule does not speak to retroactivity of interstate travel under subsection (a)(2)(B). Rather, it speaks solely to the retroactivity of subsection (a)(1), which refers to the remainder of SORNA in defining who must register. This Rule, therefore, does not demonstrate congressional intent to capture within the Act’s scope defendants whose interstate travel is complete prior to July 27, 2006. 7
*1247
In the same vein, the government urges us to rely on floor statements by Senator Orin Hatch and Representative F. James Sensenbrenner as a basis for interpreting “travels” to encompass preSORNA interstate travel.
See 152
Cong. Rec. S8012, 8013 (daily ed. July 20, 2006) (statement of Sen. Hatch); 152 Cong. Rec. H5705, 5722 (daily ed. July 25, 2006) (statement of Rep. Sensenbrenner). But, it is a longstanding principle that absent ambiguity we cannot rely on legislative history to interpret a statute.
See, e.g., BedRoc Ltd. v. United States,
Coupled with the floor statements of Senator Hatch and Representative Sensen-brenner, the government at oral argument urged this court to examine a textual change made to SORNA between its introduction in the House of Representatives and its final passage. As initially proposed in the House of Representatives, the relevant subsection read, “whoever ... thereafter travels in interstate or foreign commerce.” Children’s Safety and Violent Crime Reduction Act of 2005, H.R. 4472, 109th Cong. § 2250(a)(2) (1st Sess.2005) (as introduced in House on Dec. 8, 2005) (emphasis added). According to the government, deletion of the word “thereafter” prior to SORNA’s passage changed the meaning of the provision to encompass travel completed before July 27, 2006.
Interpretation of the removal of “thereafter,” however, is far from obvious. It can just as plausibly be said that “thereafter” was deleted to avoid redundancy. Use of “travels” in the present tense was alone sufficient to convey Congress’s limitation of the scope of § 2250(a)(2)(B) to travel occurring after SORNA became effective. Because there is an equally plausible interpretation of Congress’s decision to delete the word “thereafter,” the government’s attempted inference from legislative history is not the “clear” or “necessary implication” required to contravene the canon against retroactivity.
Because we hold that SORNA does not apply to Husted, whose interstate travel was complete prior to the Act’s effective date, we need not reach any of his remaining arguments.
Ill
We REVERSE Husted’s conviction, VACATE his sentence, and REMAND to the district court with directions to DISMISS the indictment in accordance with this opinion.
Notes
. SORNA was enacted as Title I of the Adam Walsh Child Protection and Safety Act of 2006 ("Adam Walsh Act”), Pub.L. No. 109-248, 120 Stat. 587 (2006).
. 42 U.S.C. § 16911 (defining "sex offender” and other relevant terms), § 16913 (establishing registration requirements).
. At oral argument, the government conceded that § 2250(a)(2)(B) is an express jurisdictional element of the offense.
.Section 2250 also reaches those persons who were convicted under federal law, the law of the District of Columbia, Indian tribal law, or the law of any United States territory, see § 2250(a)(2)(A), but that portion of the statute is not at issue here.
.
United States v. Young,
. Because we find the text of the statute unambiguous, we need not apply the rule of lenity.
See United States v. Lanier,
. We need not resolve the government's perplexing argument that an interim rule pro *1247 mulgated by the Department of Justice could somehow constitute a clear statement of intent by Congress to apply SORNA retroactively-
