The purpose of this legislation is to give the International Boundary and Water Commission the authority to accept funds for projects related to wastewater treatment and flood control. This aims to improve water management and infrastructure along the U.S.-Mexico border. Key provisions of the legislation include the ability for the Commission to accept funding from both federal and non-federal sources for various water-related projects. The funds can be used for studying, designing, constructing, operating, and maintaining wastewater treatment and flood control systems.