On November 30, 2021, Thailand’s Ministry of Agriculture and Cooperatives issued in the Government Gazette the Notification of the Ministry of Agriculture and Cooperatives Re: Hazard Classification and Communication System of Hazardous Substances Responsible for the Department of Fisheries B.E. 2564 (2021) (hereinafter referred to as the Notification), according to the third paragraph of Article 5 the Hazardous Substance Act B.E. 2535 (1992), and Article 20 (1) of the Hazardous Substance Act B.E. 2535 (1992) that has been amended by the Hazardous Substance Act (No.4) B.E. 2562 (2019). It stipulates that the hazardous substances (both single substance and mixture) used in fisheries shall comply with Globally Humorized System of Classification and Labelling of Chemicals (the third revised edition of UN GHS, 2009). It took effect immediately.