Ill. Admin. Code tit. 62, § 250.40
b) The form of leases granted to persons holding a permit to explore shall generally follow the format of a standard commercial petroleum lease generally in use in the territory in which the oil, gas or other petroleum deposits are located and shall incorporate at a minimum the following basic lease terms and restrictions:
c) The leases granted to persons holding a permit to explore shall include any additional terms specified in the agreement reached with the State agency with jurisdiction over the land encompassed within the lease. These additional lease terms may include, but are not limited to, any or all of the following considerations: