P.L. 57-161 (June 17, 1902), as amended, appropriated the receipts from the sale and disposal of public lands and resources in 17 western states to the construction of irrigation works for the reclamation of arid lands. Amendments made by the Reclamation Project Act of 1939 gave the Department of the Interior, among other things, the authority to amend repayment contracts and to extend repayment for not more than 40 years. Amendments made by the Reclamation Reform Act of 1982 (RRA) eliminated the residency requirement provisions of reclamation law, raised the acreage limitation on lands irrigated with water supplied by the Bureau of Reclamation, and established and required full-cost rates for land receiving water above the acreage limit.