Franklin Roosevelt actually said...
No article or material, the exportation of which is prohibited or curtailed pursuant to the said section 6, shall be loaded or carried onto an exporting carrier for export by water or by air or presented to such an exporting carrier for loading or presented to the collector of customs for inspection and clearance for exportation until an original license therefor, or such other document as the Secretary of State shall prescribe, has been presented to the collector of customs at the port at which the article or material is to be so loaded, carried, or presented.
09/01/1941