((a)) If the Secretary of the Interior determines that conveyance of an interest under is otherwise justified but the consent required by is not given, he may, in accordance with such procedural rules and regulations as he may prescribe, grant the applicant a right to purchase, for residential use, an interest in another tract of land, five acres or less in area, from tracts made available by him for sale under this chapter (1) from the unappropriated and unreserved lands of the United States, or (2) from lands subject to classification under . Said right shall not be granted until arrangements satisfactory to the Secretary have been made for termination of the applicant’s occupancy of his unpatented mining claim and for settlement of any liability for the unauthorized use thereof which may have been incurred and shall expire five years from the date on which it was granted unless sooner exercised. The amount to be paid for the interest shall be determined in accordance with .

((b)) Any conveyance of less than a fee made under this chapter shall include provision for removal from the tract of any improvements or other property of the applicant at the close of the period for which the conveyance is made, or if it be an interest terminating on the death of the applicant, within one year thereafter.