Note by the secretariat reporting on results of the 131st GRSG session presented to WP.29 in June 2026. GRSG adopted revised Terms of Reference for the Informal Working Group on Driver Distraction and Drowsiness Warning Systems, extending its mandate until October 2028 to finalize the 01 series of amendments to UN R182 and UN R183. WP.29 recommended to AC.1 the adoption of 36 amendment packages to UN Regulations under GRSG responsibility. Mongolia acceded to the 1958 Agreement on 29 April 2026, with entry into force on 28 June 2026. WP.29 endorsed continued work on IWVTA and DETA.