42 U.S.C. § 16917
(a) In general An appropriate official shall, shortly before release of the sex offender from custody, or, if the sex offender is not in custody, immediately after the sentencing of the sex offender, for the offense giving rise to the duty to register—
(Pub. L. 109–248, title I, § 117, , 120 Stat. 595.)
References in Text This subchapter, referred to in subsec. (a)(1), was in the original “this title”, meaning title I of Pub. L. 109–248, , 120 Stat. 590, known as the Sex Offender Registration and Notification Act. For complete classification of title I to the Code, see Short Title note set out under section 16901 of this title and Tables.