§ 751.
Subtitle IV of title 49, and the Safety Appliance Acts and the several amendments made or to be made thereto, shall not apply to Puerto Rico.
([Mar. 2, 1917, ch. 145, § 38], [39 Stat. 964]; [Mar. 4, 1927, ch. 503, § 6], [44 Stat. 1421]; [May 17, 1932, ch. 190], [47 Stat. 158].)