No Commandant of the Coast Guard, superintendent of lighthouses, lightkeeper, or other person in any manner connected with the light-house service, shall be interested, either directly or indirectly, in any contract for labor, materials, or supplies for the light-house service, or in any patent, plan, or mode of construction or illumination, or in any article of supply for the light-house service.
(R.S. § 4680; June 17, 1910, ch. 301, §§ 6, 13, 36 Stat. 538, 539; June 20, 1918, ch. 103, § 7, 40 Stat. 608; 1939 Reorg. Plan No. II, § 2(a), eff. July 1, 1939, 4 F.R. 2731, 53 Stat. 1432; Aug. 4, 1949, ch. 393, §§ 1, 20, 63 Stat. 496, 561.)