Synopsis As Introduced Amends the Unified Code of Corrections. Provides that any person imprisoned in the penitentiary may, after serving 10 years or more of his or her sentence or cumulative sentences, submit a petition for sentencing review in the circuit court of the county in which he or she was originally sentenced. Establishes procedures for filing petitions for sentencing review and the manner in which hearings on those petitions are held. Provides that the Illinois Sentencing Policy Advisory Council shall report on the impact of resentencing motions on the prison population contingent on having sufficient reliable data to support the analysis. Provides that the report shall be due 3 years after the effective date of the amendatory Act. Effective immediately.