Enhancement and Conservation of National Environmental Quality Act, B.E. 2535.

The Act establishes the legal framework for the promotion and preservation of environmental quality in Thailand. It defines key concepts including environment, environmental quality, environmental quality standards, pollution, pollution conditions and the Environmental Fund. It sets out general principles and institutional arrangements for environmental management and provides the legal basis for environmental quality standards and pollution control measures.
The Act creates the National Environment Board, chaired by the Prime Minister, and assigns it responsibilities relating to environmental policy, planning and environmental quality standards. It provides for national environmental policies, environmental quality management plans and coordination among public authorities. The legislation also contains provisions on environmental protection areas, environmental monitoring, environmental impact assessment procedures, and mechanisms for responding to environmental emergencies and pollution incidents.
The Act further regulates pollution control and environmental compliance. It establishes requirements concerning pollution sources, standards and control measures, and provides administrative powers for environmental authorities. The legislation includes provisions on the Environmental Fund, licensing and supervision of environmental impact assessment professionals, liability and enforcement measures, penalties for violations, and transitional arrangements.