Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3400.1 Multiple development

(a) The granting of an exploration license, a license to mine or a lease for the exploration, development, or production of coal deposits shall preclude neither the issuance of prospecting permits or mineral leases for prospecting, development or production of deposits of other minerals in the same land with suitable stipulations for simultaneous operation, nor the allowance of applicable entries, locations, or selections of leased lands with a reservation of the mineral deposits to the United States.

(b) The presence of deposits of other minerals or the issuance of prospecting permits or mineral leases for prospecting, development or production of deposits of other minerals shall not preclude the granting of an exploration license, a license to mine or a lease for the exploration, development or production of coal deposits on the same lands with suitable stipulations for simultaneous operations.