The aim of this addendum is to inform WTO Members of the publications of the Prohibition of Certain Toxic Substances Regulations, 2025 (the 2025 Regulations). As notified in G/TBT/N/CAN/673 (dated 18 May 2022), on 14 May 2022, the Government of Canada published the proposed Prohibition of Certain Toxic Substances Regulations, 2022 (the proposed Regulations) in the Canada Gazette, Part I, for a 75-day public comment period that ended on July 28, 2022. Feedback and comments received from stakeholders and other jurisdictions were taken into consideration in the development of the 2025 Regulations. The 2025 Regulations aim to reduce the risk of toxic substances entering the Canadian environment contributing to the protection of Canada’s environment and wildlife. The 2025 Regulations repeal and replace the Prohibition of Certain Toxic Substances Regulations, 2012 (the 2012 Regulations) and introduce restrictions on the manufacture, use, sale and import of Dechlorane Plus (DP) and decabromodiphenyl ethane (DBDPE), and products containing these substances, with some time-limited exemptions (authorized activities). The 2025 Regulations also further restrict the manufacture, use, sale and import of perfluorooctane sulfonate, its salts and precursors (PFOS), perfluorooctanoic acid, its salts and precursors (PFOA), long-chain perfluorocarboxylic acids, their salts and precursors (LC-PFCAs), hexabromocyclododecane (HBCD) and polybrominated diphenyl ethers (PBDEs), and products…