TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE B: AIR POLLUTION
CHAPTER II: ENVIRONMENTAL PROTECTION AGENCY
PART 251 PROCEDURES FOR COLLECTION OF AIR POLLUTION SITE FEES
AUTHORITY: Implementing and authorized by Section 9.6 of the Environmental Protection Act [415 ILCS 9.6.].
SOURCE: Adopted at 10 Ill. Reg. 19968, effective November 14, 1986; emergency amendments at 13 Ill. Reg. 955, effective January 1, 1989 for a maximum of 150 days; amended at 13 Ill. Reg. 8867, effective May 30, 1989; amended at 22 Ill. Reg. 6652, effective March 31, 1998; amended at 28 Ill. Reg. 1370, effective January 7, 2004; amended at 34 Ill. Reg. 19007, effective November 22, 2010; amended at 36 Ill. Reg. 6803, effective April 20, 2012; amended at 43 Ill. Reg. 9959, effective August 27, 2019; amended at 49 Ill. Reg. 12937, effective September 29, 2025.