16 U.S. Code § 441e - Effective date of sections 441 to 441d
Sections 441 to 441d of this title shall become effective if and when all of the above conditions shall have been fully complied with to the satisfaction of the President of the United States, who shall then issue a proclamation declaring that the conditions precedent herein required have been complied with, and said proclamation shall formally dedicate and set aside the areas herein described in accordance with the provisions of section 441 of this title.
Proclamation declaring that conditions precedent required by sections 441 to 441d of this title have been complied with, and formally dedicating and setting aside the areas therein described was issued by the President on Jan. 25, 1939. See Proc. No. 2320, Jan. 25, 1939, 4 F.R. 457,53 Stat. 2521.