; and (B) disposition under all laws relating to mineral leasing and geothermal leasing. (3) Additional terms and conditions The Secretary may require such additional terms and conditions for the conveyances under subsection (a) as the Secretary determines to be appropriate to protect the interests of the United States. (e) Administrative costs The Secretary shall require the City or the County, as applicable, to pay all survey costs and other administrative costs associated with the applicable conveyances to the City or the County under this section. (f) Reversion If the land conveyed under subsection (a) ceases to be used for the public purpose for which the land was conveyed, the land shall, at the discretion of the Secretary, revert to the United States. (g) Tribal rights Nothing in this section alters, modifies, enlarges, diminishes, or abrogates the treaty rights of any Indian Tribe. 6. Authorization of appropriations There are authorized to be appropriated such sums as are necessary to carry out this Act.