The provisions of the Convention cover a wide range of agricultural products, homelessness, industrial products, working conditions and digital commerce. Among the most important aspects of the agreement are improving U.S. dairy farmers` access to the Canadian market, guidelines for a greater proportion of automobiles produced in the three countries and not imported from other countries, and maintaining the dispute settlement system, which is similar to that contained in NAFTA.   The North American Free Trade Agreement (NAFTA) is a treaty of the United States, Canada and Mexico. it came into force on 1 January 1994. (Since 1989, there has been free trade between the United States and Canada; NAFTA has extended this regime.) On that day, the three countries became the largest free market in the world – the combined economies of the three nations were $6 trillion and directly affected more than 365 million people. NAFTA was created to remove customs barriers for agriculture, manufacturing and services; Eliminating restrictions on investment protection of intellectual property rights. This should be done while respecting environmental and labour concerns (although many observers point to the fact that the three governments have been negligent in environmental and safety at work since the agreement came into force). Small businesses were among those expected to benefit the most from the removal of trade barriers, as this would reduce trade activity in Mexico and Canada and reduce the administrative burden associated with importing or exporting goods.
When NAFTA negotiations began in 1991, the goal for all three countries was to integrate Mexico into the developed, high-income economies of the United States and Canada. The hope was that freer trade would bring stronger and more stable economic growth to Mexico by providing new jobs and opportunities for its growing workforce and discouraging illegal immigration. For the United States and Canada, Mexico has been seen as both a promising export market and a less expensive investment site that can improve the competitiveness of U.S. and Canadian businesses. U.S. public opinion was largely divided on the North American Free Trade Agreement (NAFTA), with a wide partisan divide in belief. In a February 2018 Gallup poll, 48 percent of Americans said NAFTA was good for the U.S., while 46 percent said it was bad.  Methanex Corporation, a Canadian company, sued the United States for $970 million.