The main purpose of this legislation, titled the "Stop Fueling Cartel Violence Act," is to address the issue of hydrocarbon product smuggling by transnational criminal organizations, particularly those based in Mexico. The bill aims to enhance efforts to counteract the theft and illegal trafficking of oil and fuel, which poses significant threats to both national security and public safety in the United States. Key provisions of the legislation include a requirement for the Secretary of Defense to submit a report within 180 days of the bill's enactment.