International wheat agreement, 1956. : Message from the President of the United States transmitting the International wheat agreement, 1956, which was formulated at the United Nations Wheat Conference concluded on April 25, 1956, remained open for signature in Washington until and including May 18, 1956, and was signed during that period by plenipotentiaries of 40 governments, including the United States of America and 5 other exporting countries and 34 importing countries.