This classification system allows for greater flexibility than the CLC`s four-digit structure, by implementing a hierarchical six-digit coding system and dividing all sectors into 20 branches. Five of these sectors are primarily those that produce goods, the other 15 being exclusively those that provide some type of service. Each company receives a primary NAICS code indicating its main line of business. A company receives its main code based on the definition of the code, which generates most of the company`s revenue on a site reported last year. Although NAFTA came into force before the creation of the WTO and the WTO agreement on health and plant health measures („SPS agreement“) was implemented, It contains a detailed spS chapter and defines specific disciplines for the development, adoption and application of SPS measures15.15 Some consider that the provisions of the NAFTA SPS ACCORD are the basis of the SPS agreement.16 Like the SPS Convention, ALEFTA`s SPS disciplines are intended to prevent the application of SPS measures as disguised trade restrictions. SPS measures should also be scientifically sound and in line with international and regional standards, while explicitly recognizing each country`s right to set its appropriate level of protection (. B for example, protecting consumers from hazardous products or protecting native crops and livestock from the introduction of pests and foreign diseases).17 Notes: Data on U.S. exports to Canada are defyed from data compiled by Canada. The use of Canadian import data to data on U.S. exports requires several adjustments to compare the two series. Total exports to the United States are slightly higher.
U.S. Census Bureau, „U.S./Canada Data Exchange and Substitution,“ www.census.gov/foreign-trade/reference/guides/tradestatsinfo.html#canada. Note: State-level trade data are limited and there is no trend in NAFTA or agricultural trade between NAFTA countries by state. USTR, 2017 National Trade Estimate Report on Foreign Trade Barriers, 66. Canada`s tariff plan is available from the Canadian Border Services Agency, www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/2017/menu-eng.html. There are no national data to assess the estimated economic impact of NAFTA on major agricultural producing and exporting countries. There are studies for some states like California,34, but most of this research is dated and not exhaustive. The Ottoman Empire had until the 18th century a liberal policy of free trade, the origin of the capitulations of the Ottoman Empire, which date back to the first trade agreements signed with France in 1536 and continued in 1673 with capitulations, 1740, thus reducing tariffs on imports and exports to only 3% and 1790. The Ottoman free trade policy was welcomed by British economists, who committed themselves to free trade as J.