In addition to these rules, exporters must be able to specify their tariff classifications and understand their trade flows. This was a difficult undertaking for Thai companies, as was the case when the new version (2012) of the Thai HS code of the experiment was amended. Thai Customs asked the exporter (and importer) to indicate the classification of the product under the new version, which sometimes depended on the previous version. During this period and in accordance with the rules, the country of origin (C/O) forms still required the old version of the HS Code (2007), which contained further information in the customs declaration. The requirement for Thai companies was to meet the requirements of a 2012 tariff change with documentation that had been obsolete for five years. As the process was difficult, some exporters did not wait to get the exposed C/O in time and skipped the lawsuit. The single highest average tariff applied in 2011 in Thailand was 9.8%. While the average tariff applied to agricultural products is higher than that of non-agricultural goods, the high average tariff was applied to beverages and tobacco, clothing, fruits, vegetables and plants. Although Thai exporters have few barriers to exporting, the country`s high import tariffs, which apply even to small domestic production, are barriers to trade (Shiino, K. 2012). The country has imposed a series of regional trade agreements.

Among them, Thailand is a founding member of ASEAN, the third largest trading bloc in the world after the European Union (EU), which wants to transform itself into the ASEAN Economic Community (AEC) by 2015.