The original section 3 of act Mar. 19, 1918, providing for daylight-savings, was repealed by act Aug. 20, 1919, ch. 51,
41 Stat. 280.
1948—Act June 24, 1948, inserted proviso relating to common carriers.
Section 2 of act June 24, 1948, provided that: “This Act [amending this section] shall take effect at 2 o’clock antemeridian of the second Monday following the date of its enactment.”