430 ILCS 50/6

It is the responsibility of any person who leases, operates or controls any facilities, equipment, structures, or locations for the use, storage, or manufacture of hazardous materials to display on such facility, equipment, structure, or location appropriate hazard signage as described and in such manner as provided by regulation promulgated pursuant to Section 5 of this Act or as provided by ordinance or regulation adopted by a unit of local government pursuant to Section 5.11.