15. On behalf of IWG for Wet Grip on Worn Tyres (WGWT), the expert of France reported on their progress (GRBP-73-18).

16. The expert from EC proposed to include C2 and C3 tyres in the Terms of Reference of IWG WGWT (GRBP-73-02). The expert from ETRTO presented a preliminary assessment of wet grip on worn C2 and C3 tyres (GRBP-73-22) and suggested further modifications to the Terms of Reference (GRBP-73-08). Based on a consolidated proposal in GRBP-73-27-Rev.1, GRBP adopted revised Terms of Reference of IWG WGWT as laid down in Annex III to the session report.

17. The expert from ETRTO proposed to introduce in UN Regulation No.117 a definition of “ice tyre” for C1 tyres (GRBP-73-19). The Chair invited ETRTO to submit a working document for consideration at the next session.