730 ILCS 5/5-1-13 : Rights and Remedies — Corrections — Unified Code of Corrections — Chapter V. Sentencing — General Definitions —1-13 - Intellectual disability TEXT PDF "Intellectual disability" means sub-average general intellectual functioning generally originating during the developmental period and associated with impairment in adaptive behavior reflected in delayed maturation or reduced learning ability or inadequate social adjustment. 730 ILCS 5/5-1-13 P. A. 77-2097. Amended by P.A. 099-0143,§ 910, eff. 7/27/2015. Amended by P.A. 097-0227,§ 145, eff. 1/1/2012.