Factory Act, B.E. 2535 (1992).

The 65 Sections of this Act are divided into 3 Chapters: Factory Operation (I); Factory Supervision (II); Penalties (III).
The Minister shall have the power to prescribe in Ministerial Regulations categorizing factory of any type, kind, or size to be as Category 1 factory, Category 2 factory, or Category 3 factory, by taking into account the necessity for control and supervision, prevention of nuisance, prevention of damage, and prevention of danger in accordance with the severity of impact on the people or environment, by the following categorization: (1) Category 1 factory is a factory of the type, kind, and size, capable of factory operation immediately as desired by the factory operator; (2) Category 2 factory is a factory of the type, kind, and size, which requires a notice to be made to the license grantor prior to its operation; (3) Category 3 factory is a factory of the type, kind, and size, the setting up of which requires a license. In the case where an inspection of a factory or machinery is required, private entity may be designated to carry out such inspection.