The logic of formal trade agreements is that they reduce penalties for deviation from the rules set out in the agreement.  As a result, trade agreements make misunderstandings less likely and create confidence on both sides in the sanction of fraud; this increases the likelihood of long-term cooperation.  An international organization such as the IMF can further encourage cooperation by monitoring compliance with agreements and reporting violations.  It may be necessary to monitor international agencies to detect non-tariff barriers that are disguised attempts to create barriers to trade.  One of GATT`s main achievements has been indiscriminate trade. Any GATT signatory should be treated like any other, known to be the nation`s most privileged principle and entered into the WTO. The practical result was that, once a country had negotiated a tariff reduction with some other countries (usually its major trading partners), this reduction would automatically apply to all GATT signatories. There were escape clauses under which countries could negotiate exemptions if their domestic producers were particularly harmed by tariff reductions. The North American Free Trade Agreement (NAFTA) of January 1, 1989, when it came into force, was between the United States, Canada and Mexico, which was to remove customs barriers between the various countries. In addition, tariff liberalization can also take place gradually over several years.
For example, a product duty can be lowered by 8% of the three-year MFN rate: 5% in the first year, 3% in the second year to 0% in the third year. The General Agreement on Tariffs and Trade (GATT), signed on 30 October 1947 by 23 countries, was a legal agreement to minimize barriers to international trade by eliminating or reducing quotas, tariffs and subsidies, while maintaining important rules. The GATT is expected to stimulate economic recovery after the Second World War through the reconstruction and liberalization of world trade.