Here is a list of free trade countries and preferential treatment requirements. The United States and the Republic of Korea signed the U.S.-Korea Free Trade Agreement (KORUS Free Trade Agreement) on June 30, 2007. The United States and the Republic of Korea implemented the agreement on March 15, 2012. Or there are guidelines that exempt certain products from duty-free status to protect domestic producers from foreign competition in their industries. Governments with free trade policies or agreements do not necessarily abandon import and export controls or eliminate all protectionist policies. In modern international trade, few free trade agreements lead to completely free trade. At the international level, there are two open access databases that have been developed by international organizations for policy makers and businesses: both trade creation and trade diversion have a decisive impact on the implementation of a free trade agreement. The creation of trade will result in a shift in consumption from a cost producer to a low-cost producer, which will lead to an expansion of trade. On the other hand, trade diversion will mean that trade will move from a low-cost producer outside the zone to a more expensive producer in the free trade agreement.  Such offshoring will not benefit consumers under the free trade agreement, which will be deprived of the opportunity to purchase cheaper imported goods. However, economists note that trade diversion does not always harm the overall national well-being: it can even improve national well-being as a whole if the volume of misappropriated trade is low.  In the modern world, free trade policy is often implemented by a formal and reciprocal agreement between the nations concerned.
However, a free trade policy may simply be the absence of trade restrictions. Few issues divide economists and the scope of public opinion as much as free trade. Studies show that economists at U.S. university faculties are seven times more likely to support a free trade policy than the general public. In fact, the American economist Milton Friedman said: “The economic profession was almost unanimous on the question of the desire for free trade.” The market access card was developed by the International Trade Centre (ITC) to support companies, governments and market access researchers.