Section, acts Feb. 13, 1911, ch. 46, §5, 36 Stat. 901; Feb. 7, 1920, ch. 61, 41 Stat. 402; Sept. 21, 1922, ch. 356, title IV, §643, 42 Stat. 990; June 2, 1970, Pub. L. 91–271, title III, §315, 84 Stat. 293, provided extra compensation for boarding officers performing services at night or on Sundays and holidays, prior to the general revision of section 5 of act Feb. 13, 1911, by section 13811(a) of Pub. L. 103–66, title XIII, Aug. 10, 1993, 107 Stat. 668. Section 5 of act Feb. 13, 1911, as amended by section 13811(a) of Pub. L. 103–66, is classified to section 267 of this title.