Franklin Roosevelt actually said...
The Secretary of War, the Secretary of the Navy, and the Secretary of the Treasury may promulgate, for the service pertaining to their respective departments, such additional regulations, supplementary to these regulations and not in conflict therewith, as they may deem proper, and may from time to time alter, modify, or rescind such regulations.
Context
Executive Order 7786—Amendment of Executive Order No. 4601 of March 1, 1927, Prescribing Regulations Pertaining to the Award...
01/07/1938