Other free trade agreements, such as those negotiated by the United States, are much broader and cover other issues, including services and investment. These agreements generally serve as a reference to existing WTO agreements. They often seek to go beyond what is stipulated in WTO rules. Georgia said the agreement will significantly support investment in participating states. The parties are working to regulate the rules of origin of the agreement, Georgia added. Ukraine said full implementation of the agreement would help the parties achieve a predictable business environment and boost development. Moldova has stated that free trade agreements such as this are an important complement to the multilateral trading system. Azerbaijan, a WTO observer, said the agreement is part of positive developments that the parties have already benefited from with some GUAM member states under existing free trade agreements. The General Agreement on Tariffs and Trade (GATT 1994) originally defined free trade agreements that were to include only trade in goods.  An agreement with a similar purpose, namely the improvement of trade in services, is referred to as the “economic integration agreement” in Article V of the General Agreement on Trade in Services (GATS).  However, in practice, the term is now commonly used [by whom?] to refer to agreements that concern not only goods, but also services and even investments. Environmental provisions have also become increasingly common in international investment agreements, such as free trade agreements. 104 They are based on assumptions that free trade and the abolition of investment rules will lead to economic growth, poverty reduction, improved living standards and employment opportunities.
Unlike a customs union, parties to a free trade agreement do not hold common external tariffs, i.e. different tariffs, or other policies concerning non-members. This function allows non-parties to free themselves as part of a free trade agreement by entering the market with the lowest external tariffs. Such a risk requires the introduction of rules for determining which products originate may be preferred under a free trade agreement, which is not necessary for the establishment of a customs union.  In principle, there is a minimum processing time leading to a “substantial processing” of the products, so they can be considered original products. By the definition of products originating in the PTA, the preferential rules of origin distinguish between domestic and non-origin products: only the former are eligible for preferential tariffs provided by the ESTV, which must pay the import duties of the MFN.  First, tariffs and other rules applicable to trade with non-parties to this free trade area in each of the parties that signed a free trade area in force at the time of the creation of this free trade area must not be higher or more restrictive than tariffs and other rules applicable in the same signatory countries prior to the creation of the free trade area. In other words, the creation of a free trade area to give preferential treatment to their members is legitimate under WTO law, but parties to a free trade area are not allowed to treat non-parties less favourably than before the creation of the territory. A second requirement under Article XXIV is that tariffs and other trade barriers must be eliminated primarily for all trade within the free trade area.  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 Article XXIV of the GATT authorizes WTO members to establish