According to the Social Networks and Archival Context Project (2012), the FSA:
"was created by the President's Reorganization Plan No. I of 1939, effective July 1, 1939, as an organization for the promotion of social and economic security, educational opportunity, and health. Upon its creation the FSA had oversight responsibility for the following constituent units transferred from other agencies: Office of Education, Public Health Service, National Youth Administration, Civilian Conservation Corps, Social Security Board, and U.S. Employment Service. The Radio Division and U.S. Film Service were transferred from the Department of the Treasury and incorporated into the Office of Education by Reorganization Plan No. II of 1939, effective July 1, 1939" (http://socialarchive.iath.virginia.edu/xtf/view?docId=united-states-federal-security-agency-cr.xml).