Agreement and joint declaration between the United States of America and Colombia respecting reciprocal trade. Signed at Washington, September 13, 1935; approved and confirmed by the President of the United States, October 25, 1935; ratified by the President of the Republic of Colombia, April 20, 1936; instrument of approval and confirmation and instrument of ratification exchanged at Bogota, April 20, 1936; proclaimed by the President of the United States, April 20, 1936; effective May 20, 1936.