The Secretary of State, acting through the United States Commissioner, International Boundary and Water Commission, United States and Mexico, is hereby authorized to conclude with the appropriate official or officials of the Government of Mexico an agreement for the joint construction, operation, and maintenance by the United States and Mexico, in accordance with the provisions of the treaty of February 3, 1944, with Mexico, of a major international storage dam on the Rio Grande at the site and having substantially the characteristics described in minute numbered 207 adopted June 19, 1958, by the said Commission, and in the "Rio Grande International Storage Dams Project—Report on Proposed Dam and Reservoir" prepared by the United States Section of the said Commission and dated September 1958.