225 ILCS 610/9.3
All permittees shall record each collection of rendering materials or used cooking grease and cooking oil, setting forth the date, quantity and description of rendering material or used cooking grease and cooking oil collected, and the person to whom such material was delivered. The permittee shall give a receipt to every person from whom the permittee collects rendering materials or used cooking grease and cooking oil. The original of such records, and a copy of all receipts given by the permittee for rendering material or used cooking grease and cooking oil shall be retained by the permittee until the rendering materials or used cooking grease and cooking oil are delivered to their destination. Thereafter, the record and receipt shall be retained by the permittee for a minimum of 3 months and shall be available for inspection by authorized personnel of the Department.
225 ILCS 610/9.3