(1)(a) Except as provided in subsection (2) of this section, any person to whom the Sex Offender Registration Act applies shall be required to register during any period of supervised release, probation, or parole and shall continue to comply with the act for the period of time after the date of discharge from probation, parole, or supervised release or release from incarceration, whichever date is most recent, as set forth in subdivision (b) of this subsection. A sex offender shall keep the registration current for the full registration period but shall not be subject to verification procedures during any time the sex offender is in custody or under an inpatient civil commitment, unless the sex offender is allowed a reduction in his or her registration period under subsection (2) of this section.
(b) The full registration period is as follows:
(i) Fifteen years, if the sex offender was convicted of a registrable offense under section 29-4003 not punishable by imprisonment for more than one year;
(ii) Twenty-five years, if the sex offender was convicted of a registrable offense under section 29-4003 punishable by imprisonment for more than one year; or
(iii) Life, if the sex offender was convicted of a registrable offense under section 29-4003 punishable by imprisonment for more than one year and was convicted of an aggravated offense or had a prior sex offense conviction or has been determined to be a lifetime registrant in another state, territory, commonwealth, or other jurisdiction of the United States, by the United States Government, by court-martial or other military tribunal, or by a foreign jurisdiction.
(2) A sex offender who is required to register for fifteen years may request a reduction in the registration period to ten years upon completion of ten years of the registration period after the date of discharge from probation, parole, supervised release, or incarceration, whichever date is most recent. The sex offender shall make the request to the Nebraska State Patrol. The sex offender shall provide proof that, during such registration period, he or she:
(a) Was not convicted of any offense for which imprisonment for more than one year could have been imposed;
(b) Was not convicted of any sex offense;
(c) Successfully completed any period of probation, parole, supervised release, or incarceration; and
(d) Successfully completed an appropriate sex offender treatment program.
(3) Any time period when any person who is required to register under the act knowingly or willfully fails to comply with such registration requirement shall not be counted as completed registration time and shall be used to recalculate the registration period. The recalculation shall be completed by the sex offender registration and community notification division of the Nebraska State Patrol.