Public laws, 83d Congress. 289. S. 727, act to provide that certain costs and expenses incurred in connection with certain repayment contracts with irrigation districts approved by acts of Congress of May 6, 1949 (63 Stat. 62), Oct. 27, 1949 (63 Stat. 941), and June 23, 1952 (60 Stat. 151, 153), shall be nonreimbursable.