Only goods which qualify under the NAFTA Rules of Origin can obtain NAFTA tariff preference, i.e., reduced or eliminated tariffs. The NAFTA Rules of Origin take into account where goods are produced and what materials are used to produce them. The purpose is to ensure that North American goods traded among the three NAFTA partner countries receive preferential tariff treatment. Products of other countries merely being transhipped through or undergoing only minor operations in North America are not eligible for NAFTA benefits.