05/25/1949
https://www.presidency.ucsb.edu...
"The Secretary of Defense is hereby authorized to redelegated, subject to such conditions as the Secretary may deem appropriate, to the Secretaries of the Army, Navy, and Air Force such functions under..."
"There is hereby delegated to the Secretary of Defense the authority vested in the President by section 21 of the Universal Military Training and Service Act"
"It is a pleasure to be with you this morning."
"Provided, that nothing contained herein shall be construed to prevent voluntary re-enlistments or voluntary extension of existing enlistments under the provisions of applicable laws or the regulations..."