Section is comprised of proviso clause of section 7 of act Mar. 2, 1917. The text preceding the proviso clause of section 7 is classified to section 747 of this title.

“Puerto Rico” substituted in text for “Porto Rico” pursuant to act May 17, 1932, which is classified to section 731a of this title.

For delegation to Secretary of the Interior of authority vested in President by this section, see Ex. Ord. No. 10250, eff. June 5, 1951, 16 F.R. 5385, set out under section 301 of Title 3, The President.