Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3910.42 Limitations on exploration licenses

(a) The issuance of an exploration license for an area will not preclude the BLM's approval of an exploration license or issuance of a Federal oil shale lease for the same lands.

(b) If an oil shale lease is issued for an area covered by an exploration license, the BLM will terminate the exploration license on the effective date of the lease for those lands that are common to both.