In all lettings of contracts in connection with the Indian Service, the proposals or bids received shall be filed and preserved..[1]
(Aug. 15, 1876, ch. 289, § 3, 19 Stat. 199; June 21, 1906, ch. 3504, 34 Stat. 328; Pub. L. 104–316, title I, § 112(b), Oct. 19, 1996, 110 Stat. 3833.)