20 ILCS 1305/80-10

(a) The Department of Alcoholism and Substance Abuse, the Department of Mental Health and Developmental Disabilities, and the Department of Rehabilitation Services are abolished on July 1, 1997. (b) The terms of the persons then serving as the directors and assistant directors of the Department of Alcoholism and Substance Abuse, the Department of Mental Health and Developmental Disabilities, and the Department of Rehabilitation Services shall end on July 1, 1997, and those offices are abolished on that date. (c) For the purposes of the Successor Agency Act, the Department of Human Services is declared to be the successor agency of the Department of Alcoholism and Substance Abuse, the Department of Mental Health and Developmental Disabilities, and the Department of Rehabilitation Services. (d) For the purposes of the Successor Agency Act, the Department of Human Services is declared to be the successor agency of the Department of Public Aid, the Department of Public Health, and the Department of Children and Family Services, but only with respect to the functions of those Departments that are transferred to the Department of Human Services under this Act.