Free trade agreements help create an open and competitive international market. All these agreements together still do not constitute free trade in its laissez-faire form. U.S. special interest groups have managed to impose trade restrictions on hundreds of imports, including steel, sugar, cars, milk, tuna, beef and denim. It should be noted that, when authorising the origin criteria, there is a difference in treatment between inputs originating inside and outside a free trade agreement. Normally, inputs from one FHA party are considered to come from the other party if they are included in that other party`s manufacturing process. Sometimes the production costs incurred in one party are also considered to be those incurred in another party. In preferential rules of origin, such a difference in treatment is generally provided for in the determination of cumulation or accumulation. Such a clause also explains the above-mentioned effects of a free trade agreement on the creation and diversion of trade, since a party to a free trade agreement has an incentive to use inputs originating in another party in order for its goods to qualify for originating status.
 Under a free trade agreement, countries may agree not to discriminate against service suppliers or investors from other countries and not to erect specific barriers to trade and investment. This can provide New Zealand exporters with new opportunities in areas such as private education, ICT services, professional services and transport services, and provide greater security and transparency for New Zealand service providers and investors. Other sub-agreements have been adopted to address concerns about the potential impact of the Treaty on the labour market and the environment. Critics feared that low wages in Mexico would attract the United States. and Canadian businesses, which led to a relocation of production to Mexico and a rapid decline in manufacturing jobs in the United States and Canada. Environmentalists, meanwhile, have worried about the potentially catastrophic effects of rapid industrialization in Mexico, as that country has no experience in implementing and enforcing environmental regulations. Possible environmental issues were addressed in the North American Agreement on Environmental Cooperation (NAAEC), which established the Commission for Environmental Cooperation (CEC) in 1994. Or there could be policies that exempt certain products from duty-free status to protect domestic producers from foreign competition in their industries. Free trade agreements, which form free trade areas, are generally outside the scope of the multilateral trading system.
However, WTO Members must inform the Secretariat when concluding new free trade agreements and, in principle, the texts of free trade agreements are submitted to the Committee on Regional Trade Agreements for consideration.  Although a dispute arising in free trade areas is not the subject of a dispute before the WTO Dispute Settlement Body, “there is no guarantee that WTO panels will diminish and refuse to exercise jurisdiction in a particular case.”  Although NAFTA could not deliver on everything its proponents had promised, it remained in force .. . .