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.