Thailand Ethnic. ○ BOI : The Board of Investment of Thailand. BOI Zoning As decentralization is a major theme in devising the BOI incentive scheme, the country is divided into three zones based on economic factors (with earnings and primary facilities as criteria of each province.)
Zone 1 Bangkok, Nakhon Pathom, Nonthaburi, Pathoum Thani, Samut Prakan, and Samut Sakhon Zone 2.
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