Section 38
SEC. 38. Leases shall run for a period of not more than twenty-five years, but may be renewed once for another period of not to exceed twenty-five years, in case the lessee shall have made important improvements which, in the discretion of the Secretary of Agriculture and Commerce justify a renewal. Upon the final expiration of the lease, all buildings and other permanent improvements made by the lessee, his heirs, executors, administrators, successors, or assigns shall become the property of the Government, and the land together with the said improvements shall be disposed of in accordance with the provisions of chapter five of this Act.