Section 6. That the President is hereby authorized to utilize the
service of any or all departments and any or all officers or agents
of the United States and of the several States, Territories and the
District of Columbia and subdivisions thereof, in the execution of
this act, and all officers and agents of the United States and of the
several States, Territories and subdivisions thereof, and of the
District of Columbia, and all persons designated or appointed under
regulations prescribed by the President, whether such appointments
are made by the President himself or by the Governor or other officer
of any State or Territory to perform any duty in the execution of
this act, are hereby required to perform such duty as the President
shall order or direct, and all such officers and agents and persons
so designated or appointed shall hereby have full authority for all
acts done by them in the execution of this act, by the direction of
the President. Correspondence in the execution of this act may be
carried in penalty envelopes bearing the frank of the War Department.