Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3465.2–1 Inspections

The authorized officer or his/her authorized representative shall have the right to enter lands under a lease or license to mine to inspect without advance notice or a search warrant, upon presentation of appropriate credentials, to determine whether the activities and conditions are in compliance with the applicable laws, regulations, notices and orders, terms and conditions of leases, licenses to mine or permits, and the requirements of the approved mining plan.