Preferential trade agreements (EPAs) or the Generalized Preference System (GSP) are a special status granted in trade by different countries. In the United States, the goal is to stimulate economic growth in developing countries, and the agreement provides duty-free access for up to 4,800 products from 129 designated countries and territories. The GSP was introduced on January 1, 1976 by the Trade Act of 1974, the U.S. government said. However, the Indian government believes that the plan has expanded since the creation of the World Trade Organization (WTO) in 1994. A common market is a customs union in which the movement of factors of production between Member States is relatively free. Preferential trade agreements are concluded between countries to promote international trade and provide advantageous access to partner countries. These preferential regimes allow foreign customers to pay a tariff of less or none on the import of the products. To benefit from this, proof of origin is required and each preferential regime is accompanied by a specific model. Since the beginning of the 20th century, several hundred bilateral THPs have been signed. The Canada Research Chair in International Political Economy`s TREND project lists approximately 700 trade agreements, the vast majority of which are bilateral.
 These tariff preferences have led to many differences in the principle of normal trade relations, namely that members of the World Trade Organization (WTO) should apply the same duty to imports from other WTO members.  A preferential trade zone (including preferential trade agreements, PTA) is a trading bloc that gives preferential access to certain products from participating countries. This requires a reduction in tariffs, but not in their total abolition. A ZEP can be implemented through a trade pact. This is the first step in economic integration. The border between a EPZ and a Free Trade Area (EEA) can be blurred, as almost all ATPs have the main objective of becoming a free trade agreement in accordance with the General Agreement on Tariffs and Trade. The fourth EU Implementation Report (other languages), published in November 2020 and preceded by the preface by DG Commerce Director-General Sabine Weyand (other languages), provides an overview of the results achieved in 2019 and the remarkable work for the EU`s 36 main preferential trade agreements.