Section 257, R.S. 3114; acts Sept. 21, 1922, ch. 356, title IV, 466, 42 Stat. 957; June 17, 1930, ch. 497, title IV, 466, 46 Stat. 719, related to duties on equipments or repair parts for vessels. See section 1466 (a) of this title. Section 258, R.S. 3115; acts Sept. 21, 1922, ch. 356, title IV, 466, 42 Stat. 957; June 17, 1930, ch. 497, title IV, 466, 46 Stat. 719; Aug. 8, 1953, ch. 397, 11(c), 67 Stat. 515, related to the remission of duties for necessary repairs. See section 1466 (d) of this title.