06/13/1917
https://www.presidency.ucsb.edu...
"I, Woodrow Wilson, President of the United States of America, do hereby proclaim and direct that all the unsold, unentered, nonmineral, unreserved lands affected by said Act, which are not withdrawn u..."
"This order shall take effect thirty days from and after its publication in the Canal Record."
"This amendment shall be effective from the date the order of March 20, 1914, became effective, viz.: April 1, 1914."
"By virtue of the authority vested in me, I hereby establish the following order for the Canal Zone"