20 ILCS 1705/18.3
The Department shall develop an effective, integrated system for delivering State-funded and State-operated services to persons with mental illness. No later than June 30, 1994, the Department shall enter into one or more cooperative arrangements with the Department of Public Aid, the Department of Rehabilitation Services, the Department of Public Health, and any other appropriate entities for administration or supervision by the Department of Mental Health and Developmental Disabilities of all State programs for services to persons in community care facilities for persons with mental illness, including but not limited to intermediate care facilities, that are supported by State funds or by funding under Title XIX of the federal Social Security Act. The Department of Human Services shall succeed to the responsibilities of the Department of Mental Health and Developmental Disabilities and the Department of Rehabilitation Services under any such cooperative arrangement in existence on July 1, 1997.
20 ILCS 1705/18.3