There are a large number of trade agreements; some are quite complex (the European Union), while others are less intense (North American free trade agreement).  The resulting level of economic integration depends on the specific type of trade pacts and policies adopted by the trade bloc: economists have attempted to assess the extent to which free trade agreements can be considered public goods. First, they deal with a key element of free trade agreements, the system of on-board tribunals, which act as arbiters in international trade disputes. These serve as a clarification of existing statutes and international economic policies, as confirmed by trade agreements.  A free trade agreement (FTA) or treaty is an agreement contrary to international law establishing a free trade area between cooperating states. Free trade agreements, a form of trade pacts, set tariffs and tariffs on imports and exports by countries, with the aim of reducing or removing barriers to trade and thereby promoting international trade.  These agreements „generally focus on a chapter with preferential tariff treatment,“ but they often contain „trade facilitation and regulatory clauses in areas such as investment, intellectual property, public procurement, technical standards, and health and plant health issues.“  The second is classified bilaterally (BTA) if it is signed between two pages, each side could be a country (or other customs territory), a trading bloc or an informal group of countries (or other customs sites). Both countries are relaxing their trade restrictions to help businesses prosper better between countries. It certainly helps to reduce taxes and helps them discuss their trade status. Generally, this is the weakened domestic industry. Industries, in particular, are covered by the automotive, oil and food sectors.  There are significant differences between unions and free trade zones. Both types of trading blocs have internal agreements that the parties enter into to liberalize and facilitate trade between them.
The key difference between unions and free trade zones is their approach to third parties [lack of ambiguity needed]. While a customs union requires all parties to apply and maintain identical external tariffs on trade with non-parties, parties to a free trade area are not subject to such a requirement. Instead, they can set and maintain any customs regime for imports from non-parties, as they see as necessary.  In a free trade area without harmonized external tariffs, the parties will adopt a system of preferential rules of origin to eliminate the risk of trade diversion [necessary ambiguities].  Since WTO members are required to communicate their free trade agreements to the secretariat, this database is based on the official source of information on free trade agreements (called the WTO-language regional trade agreement). The database allows users to obtain information on trade agreements that are communicated to the WTO by country or theme (goods, services or goods and services). This database provides users with an up-to-date list of all existing agreements, but those that are not notified to the WTO may be lacking. In addition, reports, tables and graphs containing statistics on these agreements, including preferential tariff analysis, are presented.  The creation of free trade zones is seen as an exception to the nation`s most privileged principle (MFN) in the World Trade Organization (WTO), as the preferences that parties to a free trade area agree to each other go beyond their membership obligations.
 Although GATT Article XXIV authorizes WTO members to establish free trade zones or to conclude interim agreements necessary for their establishment, there are several conditions relating to free trade zones or interim agreements leading to