Ill. Admin. Code tit. 35, § 809.402
All vehicles used to transport special waste and packages used to contain special waste shall be labeled, marked and placarded in accordance with regulations adopted by the Illinois Department of Transportation or the United States Department of Transportation or the United States Environmental Protection Agency, whichever has jurisdiction.
(Source: Amended at 36 Ill. Reg. 12332, effective July 18, 2012)