21. The expert of the Informal Working Group on Wet Grip Performance of Tyres in Worn State (IWG WGWT) presented their status report (GRBP-78-16) and draft updated Terms of Reference (GRBP-78-15). GRBP adopted the revised Terms of Reference, as laid down in annex III to the session report.

20. On behalf of the Informal Working Group on Wet Grip Performance of Tyres in Worn State (IWG WGWT), the expert from France reported on its progress (GRBP-77-30) and proposed to update its Terms of Reference (GRBP-77-03). GRBP decided to extend the mandate of IWG WGWT until February 2026 and adopted its revised Terms of Reference, as contained in annex II to the session report.