Industrial Estate Authority of Thailand Act, B.E.2522 (1979).

An industrial estate authority called the "Industrial Estate Authority of Thailand", abbreviated as "IEAT", shall be established as a juristic person with the following objects: (1) To acquire lands which are suitable for establishment or expansion of industrial estates, or for operation of other businesses beneficial to or in connection with the IEAT; (2) To improve the lands mentioned in (1) in order to provide services as well as facilities for the operations of industrial operators and commercial operators and operators of other businesses which are beneficial to or in connection with operations of industry or commerce such as provision of roads, drainage pipes, waste water treatment plants, electricity, water supply and telecommunications, etc. (3) To let, sell on hire-purchase, and sell immovable or movable properties in an industrial estate or for the direct benefits of the business of an industrial estate; (4) To engage in other businesses which are beneficial to or in connection with the businesses under the objects of the IEAT; etc.
Any person who is to operate a business in an industrial estate must have been granted a permit from the Governor or the person authorized by him. The IEAT shall be authorized to inspect and certify the types and quantities of raw materials or products, or the types and quantities of machinery, where a certificate is required or in case they are brought into or taken out of the industrial estate. The IEAT must have first obtained an approval from the Council of Ministers before proceeding with the following: (1) to invest in the establishment or expansion of an industrial estate; (2) to increase capital by reappraisal of its assets; (3) to decrease capital; (4) to raise loans in excess of Baht ten million; (5) to issue bonds or any other instruments for investment; (6) to dispose of immovable property valued by more than Baht one million, except disposal of immovable property in an industrial estate.