Irrigation water made available in the operation of reclamation project facilities may not be delivered for use in the irrigation of lands held in excess of the ownership limitations imposed by Federal reclamation law, including this subchapter, unless and until the owners thereof shall have executed a recordable contract with the Secretary, in accordance with the terms and conditions required by Federal reclamation law, requiring the disposal of their interest in such excess lands within a reasonable time to be established by the Secretary. In the case of recordable contracts entered into prior to October 12, 1982, such reasonable time shall not exceed ten years after the recordable contract is executed by the Secretary. In the case of recordable contracts entered into after October 12, 1982, except as provided in section 390rr of this title, such reasonable time shall not exceed five years after the recordable contract is executed by the Secretary.

Recordable contracts existing on October 12, 1982, shall be amended at the request of the landowner to conform with the ownership limitations contained in this subchapter: Provided, That the time period for disposal of excess lands specified in the existing recordable contract shall not be extended except as provided in subsection (e).

Any recordable contract covering excess lands sales shall provide that a power of attorney shall vest in the Secretary to sell any excess lands not disposed of by the owners thereof within the period of time specified in the recordable contract. In the exercise of that power, the Secretary shall sell such lands through an impartial selection process only to qualified purchasers according to such reasonable rules and regulations as the Secretary may establish: Provided, That the Secretary shall recover for the owner the fair market value of the land unrelated to irrigation water deliveries plus the fair market value of improvements thereon.

In the event that the owner of any lands in excess of the ownership limitations of Federal reclamation law has heretofore entered into a recordable contract with the Secretary for the disposition of such excess lands and has been prevented from disposing of them because the Secretary may have withheld the processing or approval of the disposition of the lands (whether he may have been compelled to do so by court order or for other reasons), the period of time for the disposal of such lands by the owner thereof pursuant to the contract shall be extended from the date on which the Secretary again commences the processing or the approval of the disposition of such lands for a period which shall be equal to the remaining period of time under the recordable contract for the disposal thereof by the owner at the time the decision of the Secretary to withhold the processing or approval of such disposition first became effective.