730 ILCS 141/15

Neither the State, nor any unit of local government, any county sheriff, or any agency, officer, employee, or agent thereof, shall: (1) enter into an agreement of any kind for the detention of individuals in a detention facility owned, managed, or operated, in whole or in part, by a private entity; (2) pay, reimburse, subsidize, or defray in any way any costs related to the sale, purchase, construction, development, ownership, management, or operation of a detention facility that is or will be owned, managed, or operated, in whole or in part, by a private entity; (3) receive per diem, per detainee, or any other payment related to the detention of individuals in a detention facility owned, managed, or operated, in whole or in part, by a private entity; or (4) otherwise give any financial incentive or benefit to any private entity or person in connection with the sale, purchase, construction, development, ownership, management, or operation of a detention facility that is or will be owned, managed, or operated, in whole or in part, by a private entity.