Amends the Unified Code of Corrections. Provides that the Prisoner Review Board shall be the authority for setting conditions for mandatory supervised release under specified provisions and determining whether a violation of those conditions warrant revocation of mandatory supervised release or the imposition of other sanctions. Provides that the Board shall hear by at least one member and through a panel of at least 3 members determine the conditions of mandatory supervised release, determine the time of discharge from mandatory supervised release, impose sanctions for violations of mandatory supervised release, and revoke mandatory supervised release for those sentenced under specified provisions. Provides that if a person was originally prosecuted under the provisions of the Criminal Code of 1961 or the Criminal Code of 2012, sentenced under the provisions of the Act pursuant to the Juvenile Court Act of 1987, and convicted as an adult and committed to the Department of Juvenile Justice, the Department of Juvenile Justice shall, no less than 120 days prior to the date that the person reaches the age of 21, send written notification to the Prisoner Review Board indicating the day upon which the committed person will achieve the age of 21. Requires the Prisoner Review Board to conduct a hearing with no less than 3 members to determine whether or not the minor shall be assigned mandatory supervised release or be transferred to the Department of Corrections prior to the minor's 21st birthday.