In the United States, a foreign-trade zone (FTZ) is a designated area located in or near a U.S. port of entry where domestic and foreign merchandise is considered outside U.S. customs territory for tariff purposes. In these zones, goods may be imported, stored, manipulated, manufactured, or re-exported without being subject to customs duties or other ad valorem taxes until they enter U.S. commerce. The purpose of FTZs is to promote U.S. competitiveness in international trade by reducing tariff costs on imported inputs and exported finished products.