On 28 April 2025, the National Environment Agency (NEA) of Singapore notified the WTO TBT Committee of its proposal to regulate Chlorpyrifos, Paraquat and Paraquat salts at all concentrations and in all preparation forms as hazardous substances (HS) under the Environmental Protection and Management Act (EPMA) and the Schedule of the Environmental Protection and Management (Hazardous Substances) Regulations (EPM (HS) Regs). During the 60-day comment period, Singapore did not receive any comments. Singapore has proceeded to finalise the measure. This addendum seeks to notify Members that the final measure was adopted on 12 August 2025 and published on 27 August 2025. The measure will enter into force on 27 February 2026. Once the regulations take effect, importers, manufacturers, and distributors of these chemicals and products containing these chemicals will be required to apply for a HS licence/permit for the import, export, sale, store, use, and/or transport of the chemicals.