Section 280, acts July 16, 1914, ch. 141, 1, 38 Stat. 502; 1978 Reorg. Plan No. 2, 102, 43 F.R. 36037, 92 Stat. 3783, related to promotion of apprentices in National Bureau of Standards. Section 281, acts Mar. 4, 1913, ch. 150, 1, 37 Stat. 945; 1967 Reorg. Plan No. 3, 401, eff. Aug. 11, 1967, 32 F.R. 11669, 81 Stat. 948; Dec. 24, 1973, Pub. L. 93–198, title IV, § 421, title VII, 711, 87 Stat. 789, 818, related to testing of building and other structural materials for District of Columbia.