07/01/1948
https://www.presidency.ucsb.edu...
"The primary aim of manpower mobilization is to safeguard our national security through the maximum development and use of our human resources."
"The greatest care must be exercised to assure that the supply of persons possessing critical skills will be distributed among military and civilian activities in a manner which will contribute most to..."
"The most effective use must be made of our supply of individuals having the special skills required to develop and produce the necessary equipment and to use and maintain it in the Armed Forces."
"Authority to employ persons under this subsection 101(a) in any such department or agency shall not be redelegated by the head of such department or agency."