By virtue of the authority vested in me by section 1 of the act of August 29, 1916, 39 Stat. 645 (U.S.C., title 10, sec. 1361), and as President of the United States, it is hereby ordered as follows:
1. In the administration of the statutes relating to civil aviation the Secretary of Commerce is directed to exercise his control and jurisdiction over civil aviation in accordance with requirements for the successful prosecution of the war, as may be requested by the Secretary of War.
2. The Secretary of War is authorized and directed to take possession and assume control of any civil aviation system, or systems, or any part thereof, to the extent necessary for the successful prosecution of the war.
FRANKLIN D ROOSEVELT
The White House,
December 13, 1941.
Franklin D. Roosevelt, Executive Order 8974—Control of Civil Aviation Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/368259