However, the WTO has expressed some concerns. According to Pascal Lamy, Director-General of the WTO, the dissemination of regional trade agreements (RTA) is «… is the concern of inconsistency, confusion, exponentially increasing costs for businesses, unpredictability and even injustice in trade relations.  The WTO is how typical trade agreements (called preferential or regional agreements by the WTO) are to some extent useful, but it is much more advantageous to focus on global agreements under the WTO, such as the ongoing Doha Round negotiations. A clause relating to the «government treatment of non-tariff restrictions» is necessary, as most tariff characteristics can easily be duplicated by a set of non-tariff restrictions, designed accordingly. These include discriminatory rules, selective excise or sales taxes, specific health requirements, quotas, «voluntary» import restrictions, specific licensing requirements, etc., not to mention general prohibitions. Instead of trying to list and ban all kinds of non-tariff restrictions, the signatories of an agreement require similar treatment to the processing of products manufactured within the country (for example. B steel). A trade agreement signed between more than two parties (usually neighbouring or in the same region) is considered multilateral. They face the main obstacles – to content negotiation and implementation. The more countries involved, the more difficult it is to achieve mutual satisfaction. Once this type of trade agreement is governed, it will become a very powerful agreement.
The larger the GDP of the signatories, the greater the impact on other global trade relations. The largest multilateral trade agreement is the North American Free Trade Agreement between the United States, Canada and Mexico.  There are currently a number of free trade agreements in the United States. These include multi-nation agreements such as the North American Free Trade Agreement (NAFTA), which includes the United States, Canada and Mexico, and the Central American Free Trade Agreement (CAFTA), which includes most Central American nations. There are also separate trade agreements with nations, from Australia to Peru. Once negotiated, multilateral agreements are very powerful. They cover a wider geographic area, giving signatories a greater competitive advantage. All countries also give themselves the status of the most favoured nation – and grant the best conditions of mutual trade and the lowest tariffs. Together, these agreements mean that about half of all goods arrive in the United States.