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.