43 C.F.R. § 3505.50
(a) BLM will review your application to determine compliance with land use plans, environmental requirements, unsuitability criteria and whether the lands are within a known leasing area. BLM's decision whether to approve your application is at BLM's complete discretion. If we approve your application, we will issue your permit. If we reject your application, we will mail you a written decision. This notice will:
[64 FR 53536, Oct. 1, 1999, as amended at 70 FR 58877, Oct. 7, 2005]