AUTHORITY: Implementing and authorized by Section 4 of the Environmental Protection Act [415 ILCS 5] and Section 5-10(a)(i) of the Illinois Administrative Procedure Act [5 ILCS 100].
SOURCE: Adopted and codified at 7 Ill. Reg. 7084, effective June 15, 1983; old Part repealed, new Part adopted at 11 Ill. Reg. 16550, effective October 15, 1987; amended at 42 Ill. Reg. 15991, effective August 1, 2018.