AUTHORITY: Implementing Sections of the Environmental Protection Act [415 ILCS 5/5, 7.1, 7.2, 26, 27, 28, 29, 31, 32, 33, 35, 36, 37, 38, 40, 40.1, 40.2, 41, and 58.7] and authorized by Sections 26 and 27 of the Act [415 ILCS 5/26 and 27] and Section 25-101 of the Electronic Commerce Security Act (Repealed by P.A. 102-38).

SOURCE: Filed with Secretary of State January 1, 1978; codified 6 Ill. Reg. 8357; Part repealed, new Part adopted in R88-5A at 13 Ill. Reg. 12055, effective July 10, 1989; amended in R90-24 at 15 Ill. Reg. 18677, effective December 12, 1991; amended in R92-7 at 16 Ill. Reg. 18078, effective November 17, 1992; old Part repealed, new Part adopted in R00-20 at 25 Ill. Reg. 446, effective January 1, 2001; amended in R04-24 at 29 Ill. Reg. 8743, effective June 8, 2005; amended in R06-9 at 29 Ill. Reg. 19666, effective November 21, 2005; amended in R07-17 at 31 Ill. Reg. 16110, effective November 21, 2007; amended in R10-22 at 34 Ill. Reg. 19566, effective December 3, 2010; amended in R12-22 at 36 Ill. Reg. 9211, effective June 7, 2012; amended in R13-9 at 37 Ill. Reg. 1655, effective January 28, 2013; amended in R14-21 at 39 Ill. Reg. 2276, effective January 27, 2015; amended in R15-20 at 39 Ill. Reg. 12848, effective September 8, 2015; amended in R16-17 at 40 Ill. Reg. 7912, effective May 20, 2016; amended in R17-18 at 41 Ill. Reg. 9930, effective July 5, 2017; amended in R19-19 at 43 Ill. Reg. 9674, effective August 22, 2019; amended in R19-1 at 44 Ill. Reg. 14867, effective September 4, 2020; amended in R25-23 at 49 Ill. Reg. 12670, effective September 23, 2025.