The United States Munitions List (USML), which controls the export of defence products, is currently undergoing major changes involving the moving of numerous items from the USML to the Commerce Control List (CCL). The CCL is a dual-use list subject to a lower level of control. The Canadian equivalent of the USML is the Defence Production Act, which cross-references to certain groups of items on the Export Control List (ECL). Among the targeted categories are those covering vessels of war, military vehicles, aircraft and related parts, military engines, submersibles, firearms, artillery, ammunition, explosives and toxicological agents. Once the USML overhaul is complete, Canada may apply more stringent controls than the U.S., which could impact competitiveness and diminish the benefits associated with use of the Canadian Exemptions to the U.S. ITAR rules (ITAR Part 126.5).