(225 ILCS 720/4.06) (from Ch. 96 1/2, par. 7904.06)
    Sec. 4.06. Vegetation. On regraded areas and all other lands affected, there shall be established a diverse and permanent vegetative cover capable of self-regeneration and plant succession and at least equal in extent of cover to the natural vegetation of the area.
(Source: P.A. 81-1015.)