525 ILCS 30/6.07

To formulate and adopt policies for (a) development and maintenance of the nature preserves system; (b) selection, acquisition, management, protection and use of dedicated and registered areas; (c) dedication of land within the system; (d) registration of areas; (e) protection of registered areas; (f) protection of habitats of endangered, threatened or rare species; (g) protection of geological sites; and (h) protection of archaeological sites and artifacts.