225 ILCS 720/3.21
Each permittee shall conspicuously maintain at each entrance to the surface mining and reclamation operations a clearly visible sign which sets forth the name, business address, and phone number of the permittee and the permit number of the surface mining and reclamation operations.
(from Ch. 96 1/2, par. 7903.21)
(Source: P.A. 81-1015.)