Ill. Admin. Code tit. 2, § 1375.110
a) Any interested or affected person or agency may petition the Department requesting the adoption, amendment, or repeal of a Department rule. Such petitions shall be submitted in writing to the Department of Military Affairs, 1301 N. MacArthur Blvd., Springfield, Illinois 62702-2399. Four copies of each petition, along with any supporting documents, shall be submitted in the following form: