“ The Secretary of Defense is designated National Defense Stockpile Manager. The functions vested in the President by the Strategic and Critical Materials Stock Piling Act, except the functions vested in the President by sections 7, 8, and 13 of the Act, are delegated to the Secretary of Defense. The functions vested in the President by section 8 (a) of the Act are delegated to the Secretary of the Interior. The functions vested in the President by section 8 (b) of the Act are delegated to the Secretary of Agriculture. ”