43 CFR § 3910.21
Lands subject to exploration
June 11, 2020
The BLM may issue oil shale exploration licenses for all Federal lands subject to leasing under §3900.10 of this chapter, except lands that are in an existing oil shale lease or in preference right leasing areas under the R, D and D program. The BLM may issue exploration licenses for lands in preference right lease areas only to the R, D and D lessee.