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SOURCE: Adopted at 4 Ill. Reg. 37, p. 1, effective June 1, 1982; amended at 6 Ill. Reg. 1, effective June 1, 1982; codified at 8 Ill. Reg. 4932; amended at 11 Ill. Reg. 8075, effective July 1, 1987; amended at 14 Ill. Reg. 11800, effective January 1, 1991; amended at 15 Ill. Reg. 17141, effective January 1, 1992; amended at 17 Ill. Reg. 10947, effective July 1, 1993; amended at 20 Ill. Reg. 1962, effective January 19, 1996; recodified from the Department of Mines and Minerals to the Department of Natural Resources at 21 Ill. Reg. 16192; amended at 22 Ill. Reg. 20169, effective November 5, 1998; amended at 24 Ill. Reg. 5909, effective March 21, 2000; amended at 27 Ill. Reg. 4595, effective February 26, 2003; amended at 43 Ill. Reg. 12860, effective October 16, 2019.
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