04/30/1952
https://www.presidency.ucsb.edu...
"By virtue of the authority vested in me by the Constitution and statutes of the United States particularly the Foreign Air Act of 1947, and as President of the United States, it is hereby ordered, in ..."
"This order shall become effective at the close of business on December 31, 1947."
"The field administrator referred to in section 10 of the Act, in exercising his responsibility for administering in the recipient countries the program of assistance provided for in the Act, shall act..."
"This order supersedes all prior Executive orders to the extent that they are in conflict with this order."