The purpose of this legislation is to extend the customs waters of the United States from 12 nautical miles to 24 nautical miles from the country's baselines. This change aligns U.S. law with existing international standards and a specific presidential proclamation. Key provisions of the legislation include amendments to two existing laws: the Tariff Act of 1930 and the Anti-Smuggling Act. These amendments redefine the boundaries of U.S. customs waters.