The purpose of this legislation is to ensure that Mexico meets its water delivery obligations to the United States as outlined in a treaty from 1944. The main objective is to limit U.S. engagement with the Mexican government until it fulfills these obligations, specifically regarding the delivery of water from the Colorado and Tijuana Rivers and the Rio Grande. Key provisions of the legislation include a requirement for the Secretary of State to report to Congress on Mexico's water deliveries. This report must be submitted within 180 days of the law's enactment and annually thereafter.