34 U.S.C. § 20915 — Duration of registration requirement

A sex offender shall keep the registration current for the full registration period (excluding any time the sex offender is in custody or civilly committed) unless the offender is allowed a reduction under subsection (b). The full registration period is— (1) 15 years, if the offender is a tier I sex offender; (2) 25 years, if the offender is a tier II sex offender; and (3) the life of the offender, if the offender is a tier III sex offender. The full registration period shall be reduced as described in paragraph (3) for a sex offender who maintains a clean record for the period described in paragraph (2) by— (A) not being convicted of any offense for which imprisonment for more than 1 year may be imposed; (B) not being convicted of any sex offense; (C) successfully completing any periods of supervised release, probation, and parole; and (D) successfully completing of 1 an appropriate sex offender treatment program certified by a jurisdiction or by the Attorney General. In the case of— (A) a tier I sex offender, the period during which the clean record shall be maintained is 10 years; and (B) a tier III sex offender adjudicated delinquent for the offense which required registration in a sex registry under this subchapter, the period during which the clean record shall be maintained is 25 years. In the case of— (A) a tier I sex offender, the reduction is 5 years; (B) a tier III sex offender adjudicated delinquent, the reduction is from life to that period for which the clean record under paragraph (2) is maintained.