Section 739, R.S. § 4668, related to substitution of lighthouses for lightships. Section 740, acts Mar. 3, 1915, ch. 81, § 5, 38 Stat. 927 ; Aug. 28, 1916, ch. 414, § 3, 39 Stat. 538 ; June 20, 1918, ch. 103, § 5, 40 Stat. 608 ; June 5, 1920, ch. 235, § 1, 41 Stat. 927 , related to post-lantern lights on particular waters. Section 740a, act May 22, 1926, ch. 371, § 6, 44 Stat. 626 , related to post-lantern lights on Allegheny and Rock Rivers. Section 740b, acts June 23, 1874, ch. 455, § 1, 18 Stat. 220 ; June 17, 1910, ch. 301, § 6, 36 Stat. 538 , related to lights and buoys on Mississippi, Ohio, and Missouri Rivers. Sections covered by section 541 of Title 14 , Coast Guard . Statutory Notes and Related Subsidiaries Effective Date of Repeal Repeal effective first day of third month after approval by President [ Aug. 4, 1949 ], see section 19 of act Aug. 4, 1949 , set out as an Effective Date note preceding chapter 1 of Title 14, Coast Guard .