The Secretary shall designate the lands of the Salt River Pima-Maricopa Indian Community, Arizona, and the Fort McDowell-Apache Indian Community, Arizona, or interests therein, and any allotted lands or interests therein within said communities which he determines are necessary for use and occupancy by the United States for the construction, operation, and maintenance of Orme Dam and Reservoir, or alternative. The Secretary shall offer to pay the fair market value of the lands and interests designated, inclusive of improvements. In addition, the Secretary shall offer to pay toward the cost of relocating or replacing such improvements not to exceed $500,000 in the aggregate, and the amount offered for the actual relocation or replacement of a residence shall not exceed the difference between the fair market value of the residence and $8,000. Each community and each affected allottee shall have six months in which to accept or reject the Secretary’s offer. If the Secretary’s offer is rejected, the United States may proceed to acquire the property interests involved through eminent domain proceedings in the United States District Court for the District of Arizona under sections
3113 and
3114
(a) to (d) of title
40. Upon acceptance in writing of the Secretary’s offer, or upon the filing of a declaration of taking in eminent domain proceedings, title to the lands or interests involved, and the right to possession thereof, shall vest in the United States. Upon a determination by the Secretary that all or any part of such lands or interests are no longer necessary for the purpose for which acquired, title to such lands or interests shall be restored to the appropriate community upon repayment to the Federal Government of the amounts paid by it for such lands.