77-3-121. Pooling agreements and unit plans of operation. (1) The board may enter into agreements for the pooling of acreage or yardage with others holding the mineral rights in adjoining lands for unit operation of placer mining and the apportionment of royalties on a cubic yardage or area basis in the case of placer mining deposits lying partly on land in which the state holds the mining rights and partly on land in which others hold the mining rights.
(2) From each cleanup of values under such unit operations in which any yardage or area mined on lands to which the state holds the mineral rights is included, the state is entitled to royalties computed on that proportion of the whole value of recoveries from the cleanup as the yardage or area mined from lands included in the agreement in which the state holds the mining rights bears to the total yardage or area mined and included in the cleanup.
(3) The board may also enter into agreements for the unit operation of such placer mining deposits and the apportionment of royalties upon any other equitable basis the board considers in the best interest of the state. The agreements may not change the percentage of royalties to be paid to the state under the unit operations from the percentage fixed in the lease or to a smaller percentage than the 5% minimum under 77-3-116.