 The result was that after Mexico joined NAFTA the tariff rates for many of the raw materials used by maquiladora manufacturing companies would have risen significantly, particularly for goods of Chinese origin.Prosec is a tariff-reduction measure that avoids running into problems with NAFTA article 3 by allowing either foreign or domestic producers, irrespective of whether the finished good is intended for exportation or domestic sale, to petition the government for a reduction or elimination of a tariff rate.Prosec only applies to certain sectors of the Mexican economy including automotive, textile and electronics.