P.L. 103-182 (December 8, 1993) approved and implemented the North American Free Trade Agreement (NAFTA). NAFTA pertains to cross-border trade between the United States, Mexico, and Canada. NAFTA substantially eliminated all nontariff barriers to agricultural trade between the United States and Mexico, generally through their conversion to tariff-rate quotas or ordinary tariffs, and maintained the provisions of the United States-Canada Free Trade Agreement on agricultural trade. With respect to Mexico, the law eliminated tariffs on a broad range of agricultural products and provided for a phase-out over up to 15 years for tariffs on other products. A special safeguard provision will apply to certain products, with a designated quantity of imports allowed at a NAFTA preferential tariff rate. NAFTA increases incentives for buying within the NAFTA region.