Section, act Aug. 14, 1935, ch. 531, title II, 219, as added Aug. 28, 1950, ch. 809, title I, 107, 64 Stat. 517, prescribed the effective date of this subchapter in Puerto Rico as January 1 of the first calendar year which begins more than 90 days after the date on which the President received a certification from the Governor of Puerto Rico.