; other uses (a) In general In issuing licenses and leases under this Act for land that contains deposits of coal or other nonhardrock minerals, the Secretary shall reserve to the United States such nonhardrock minerals for disposal under applicable laws. (b) Other uses of licensed and leased lands (1) In general The Secretary shall issue regulations to allow for other uses of the land covered by a prospecting license under this Act, including leases for other minerals, if such other uses would not unreasonably interfere with operations under the prospecting license. (2) Terms and conditions The Secretary shall include in each prospecting license issued under section 103(b) such terms and conditions as the Secretary determines necessary to avoid unreasonable interference with other uses occurring on, or other leases of, the licensed land. (3) Leases The Secretary shall include in leases issued under this Act stipulations to allow for simultaneous operations under other leases for the same land. 107. Royalty (a) Existing production (1) In general Production of hardrock minerals, mineral concentrates, or products derived from hardrock minerals on Federal land under an operations permit from which valuable hardrock minerals were produced in commercial quantities before the effective date of this Act, other than production under a small miner’s lease, shall be subject to a royalty established by the Secretary of not less than 8 percent of the gross value of such production. (2) Additional Federal land Production of hardrock minerals, mineral concentrates, or products derived from hardrock minerals on Federal land added through a plan modification to an operations permit that is submitted after the effective date of this Act shall be subject to a royalty established by the Secretary for such lease of not less than 12.5 percent of the gross value such production. (b) Liability The claim holder or lessee, or any operator to whom the claim holder or lessee has assigned the obligation to make royalty payments under the