The federal government has extended a Jones Act waiver for another 90 days beginning August 17, allowing specified cargoes to move between U.S. ports on foreign-flagged vessels under emergency conditions. Updated procedures require information about U.S.-flag vessel availability and the national-defense need for a waiver. The Jones Act normally reserves domestic waterborne cargo movements for qualifying U.S.-built, U.S.-flagged, and U.S.-crewed vessels. Waivers can expand shipping capacity during disruptions, but repeated or broad waivers can reduce the commercial protection intended to sustain a domestic merchant-marine and shipbuilding base. A shipping rule meant to preserve American maritime capacity loses its purpose if every emergency becomes a broad exemption. But keeping the rule rigid when domestic vessels genuinely cannot move critical cargo can raise costs and deepen a shortage.