The main provisions of NAFTA required a gradual reduction in tariffs, tariffs and other trade barriers between the three Member States, with some tariffs to be abolished immediately and others over a 15-year period. The agreement guaranteed duty-free access for a wide range of industrial products and goods traded between the signatories. “Domestic goods” have been granted to products imported from other NAFTA countries and prohibit all governments, local or provincial, from imposing taxes or tariffs on these products. After U.S. President Donald Trump took office in January 2017, he tried to replace NAFTA with a new agreement and began negotiations with Canada and Mexico. In September 2018, the United States, Mexico and Canada reached an agreement to replace NAFTA with the U.S.-Mexico-Canada Agreement (USMCA), and the three countries had ratified it until March 2020. Nafta remained in effect until the implementation of the USMCA.  In April 2020, Canada and Mexico informed the United States that they were ready to implement the agreement.  The USMCA came into force on July 1, 2020 and replaced NAFTA.
NAFTA contained two important endorsements that concealed concerns that companies would relocate their production and production sites to other participating countries to use lower wages and occupational health and safety rules. According to a 2013 Jeff Faux article published by the Economic Policy Institute, California, Texas, Michigan and other high-concentration manufacturing states were most affected by NAFTA job losses.  According to a 2011 article by EPI economist Robert Scott, the trade agreement has “lost or supplanted” some 682,900 U.S. jobs.  Recent studies have agreed with congressional Research Service reports that NAFTA has little influence on manufacturing employment and automation, accounting for 87% of manufacturing job losses.  According to a 2012 study on TARIFF reductions on NAFTA, trade with the United States and Mexico increased by only 11% in Canada, compared to a 41% increase in the United States and 118% in Mexico. :3 In addition, the United States and Mexico benefited more from the rate reduction, with an increase in social benefits of 0.08% and 1.31%, with Canada recording a decrease of 0.06%. :4 This classification system allows for greater flexibility than the ciSC`s four-digit structure, by establishing a six-digit hierarchical coding system and dividing all sectors into 20 branches. Five of these sectors are primarily those that produce goods, the other 15 being exclusively those that provide some type of service. Each company receives a primary NAICS code indicating its main line of business. A company receives its main code based on the definition of the code, which generates most of the company`s revenue on a site reported last year. Shortly after his election, U.S.
President Donald Trump said he would begin renegotiating NAFTA terms to resolve trade issues for which he campaigned. The heads of state and government of Canada and Mexico have expressed their willingness to cooperate with the Trump administration.  Although he vaguely formulated the precise terms he wants in a renegotiated NAFTA, Trump has threatened to withdraw from it if negotiations fail.  One of the criticisms of NAFTA is the destruction of American jobs. Critics say the agreement led to the relocation of U.S. jobs to Mexico, even after the participating countries signed the North American agreement on cooperation at work. According to Chad Bown of the Peterson Institute for International Economics, the Trump administration`s list “is very consistent with the president`s position on trade barriers that like protectionism.