Convention between the United States of America and other members of the International Labor Organization respecting officers' competency certificates. Adopted by the General Conference of the International Labor Organization, twenty-first session, Geneva, October 24, 1936; ratification advised by the Senate of the United States, subject to understandings, June 13, 1938; ratified by the President of the United States, subject to the said understandings, September 1, 1938; ratification of the United States of America registered with the Secretary General of the League of Nations October 29, 1938; proclaimed by the President of the United States September 29, 1939.