; other uses (a) In general In issuing licenses and leases under this Act for lands that contain 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 promulgate regulations to allow for other uses of the lands 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) Prospecting licenses The Secretary shall include in such prospecting licenses such terms and conditions as the Secretary finds necessary to avoid unreasonable interference with other uses occurring on, or other leases of, the licensed lands. (3) Leases The Secretary shall include in leases under this Act stipulations to allow for simultaneous operations under other leases for the same lands. 107. Royalty (a) Existing production Production of hardrock minerals on any Federal land under an operations permit from which valuable hardrock minerals were produced in commercial quantities before the date of the enactment of this Act, other than production under a small miners lease, shall be subject to a royalty established by the Secretary at no less than 8 percent of the gross value of such production, or of mineral concentrates or products derived from hardrock minerals. Any Federal land added through a plan modification to an operations permit on Federal land that is submitted after the date of enactment of this Act shall be subject to a royalty established by the Secretary for such lease 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. (b) Liability The claim or leaseholder, or any operator to whom the claim or lease holder has assigned the obligation to make royalty payments under the claim or lease and any person who controls such claim or