730 ILCS 154/40
A person who becomes subject to registration under this Article who has previously been subject to registration under this Article or under the Sex Offender Registration Act or similar registration requirements of other jurisdictions shall register for the period of his or her natural life if not confined to a penal institution, hospital, or other institution or facility, and if confined, for the period of his or her natural life after parole, discharge, or release from any such facility. Any other person who is required to register under this Act shall be required to register for a period of 10 years after conviction or adjudication if not confined to a penal institution, hospital or any other institution or facility, and if confined, for a period of 10 years after parole, discharge or release from any such facility. A violent offender against youth who is allowed to leave a county, State, or federal facility for the purposes of work release, education, or overnight visitations shall be required to register within 5 days of beginning such a program. Liability for registration terminates at the expiration of 10 years from the date of conviction or adjudication if not confined to a penal institution, hospital or any other institution or facility and if confined, at the expiration of 10 years from the date of parole, discharge or release from any such facility, providing such person does not, during that period, again become liable to register under the provisions of this Act. Reconfinement due to a violation of parole or other circumstances that relates to the original conviction or adjudication shall extend the period of registration to 10 years after final parole, discharge, or release. The Director of the Illinois State Police, consistent with administrative rules, shall extend for 10 years the registration period of any violent offender against youth who fails to comply with the provisions of this Act. The registration period for any violent offender against youth who fails to comply with any provision of the Act shall extend the period of registration by 10 years beginning from the first date of registration after the violation. If the registration period is extended, the Illinois State Police shall send a registered letter to the law enforcement agency where the violent offender against youth resides within 3 days after the extension of the registration period. The violent offender against youth shall report to that law enforcement agency and sign for that letter. One copy of that letter shall be kept on file with the law enforcement agency of the jurisdiction where the violent offender against youth resides and one copy shall be returned to the Illinois State Police.
730 ILCS 154/40