Informal meetings are scheduled in conjunction with the GRBP session from 31 August to 4 September 2026. The IWG RD-ASEP Workshop runs in two parts on 31 August and 1 September in Concordia 5 and H.207, in-person only and hybrid respectively. The Task Force – Vehicle Sound meets on 1 September in H.207 in hybrid format. The Working Party on Noise and Tyre holds its 84th session on 2, 3, and 4 September in Room XI in-person only. All meetings are located at Palais des Nations. Interpretation services in English, French and Russian are provided from Wednesday morning to Friday evening in Room XI.