All functions, services, and duties of the department of behavioral healthcare, developmental disabilities and hospitals shall be organized by the director with the approval of the governor as to:

(1)  Division of behavioral health care which includes the program areas of integrated mental health services and substance abuse treatment and prevention services;

(2)  Division of hospitals and community rehabilitation services to include the Zambarano unit, the Cranston unit, and the adult psychiatric services unit of the Eleanor Slater Hospital;

(3)  Division of developmental disabilities; and

(4)  Management services to include all management, financial, and other services necessary to ensure the proper operation of the department.