AUTHORITY: Implementing and authorized by Section 4 of the Environmental Protection Act (Ill. Rev. Stat. 1981, ch. 111½, par. 1004) and by Section 5 of The Illinois Purchasing Act (Ill. Rev. Stat. 1981, ch. 127, par. 132.5).
SOURCE: Filed December 20, 1977; rules repealed, new rules adopted and codified at 7 Ill. Reg. 13871, effective November 4, 1983; recodified at 8 Ill. Reg. 12931.