land use plan treating hardrock mining as a multiple-use activity has not been completed, the Secretary concerned shall ensure that the land to be covered by the license is suitable for mineral activities. (3) Extension A prospecting license may be extended for up to an additional four years upon a showing by the licensee that the licensee explored with reasonable diligence and was unable to determine the existence and workability of a valuable deposit covered by the license, or that the failure to perform diligent prospecting activities was due to conditions beyond the licensee’s control. (c) Noncompetitive leases (1) In general Upon a showing to the satisfaction of the Secretary by a prospecting licensee under subsection (a) that a valuable deposit of a hardrock mineral has been discovered by the licensee within an area covered by the prospecting license, the licensee shall be entitled to a lease for any or all of the land included in the prospecting license, as well as any nonmineral lands necessary for processing or milling operations, at a royalty of no less than 12.5 percent of the gross value of production of hardrock minerals or mineral concentrates or products derived from hardrock minerals under the lease. Rentals for such lease shall be set by the Secretary at no less than $10 per acre per year, with rentals paid in any one year credited against royalties accruing for that year. (2) Lease period (A) In general A lease under this section shall be for a period of 20 years, with the right to renew for successive periods of 10 years if hardrock minerals are being produced in commercial quantities under the lease. (B) Extension during nonproduction If hardrock minerals are not being produced in commercial quantities at the end of the primary term or any subsequent term of such a lease, the Secretary may issue a 10-year extension of the lease in the interest of conservation or upon a successful showing by the lessee that the lease cannot be successfully operated at a profit or for other reasons. No more