405 ILCS 20/2
Any county, city, village, incorporated town, township, public health district, county health department, multiple-county health department, school district or any combination thereof, in consultation with and being advised by the Department of Human Services, shall have the power to construct, repair, operate, maintain and regulate community mental health facilities to provide mental health services as defined by the local community mental health board, including services for, persons with a developmental disability or substance use disorder , for residents thereof and/or to contract therefor with any private or public entity which provides such facilities and services, either in or without such county, city, village, incorporated town, township, public health district, county health department, multiple-county health department, school district or any combination thereof.
405 ILCS 20/2