17. The representative of the Group Of Interested Experts (GOIE) on Tyre Noise Level Alignment (TNLA) in UN Regulation No. 117 introduced GRBP-84-29. The Chair invited further updates during forthcoming sessions of GRBP.
18. The representative of ETRTO introduced ECE/TRANS/WP.29/GRBP/2026/16 and ECE/TRANS/WP.29/GRBP/2026/17, as amended by GRBP-84-19 and GRBP-84-20 respectively. The representative of the UK asked additional information about the use of “no performance change” in the justification associated with the updated reference to ASTM standard. The representative of ETRTO clarified that ETRTO was not overseeing ASTM standards, and that the performance has not been changed between the two version of the ASTM standards. The representative of France asked if similar proposals could be expected for other tyre legislation apart from UN Regulation No. 117. The representative of ETRTO confirmed other tyre legislation could also be concerned by similar updates in the future.
19. The representative of ETRTO introduced GRBP-84-18 improving the 02 series of amendments to UN Regulation No. 117 similarly to GRBP-83-24-Rev.1 introduced during the last session of GRBP.
20. GRBP adopted ECE/TRANS/WP.29/GRBP/2026/16, as amended by GRBP-84-19, as well as GRBP-84-18, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2027 sessions as draft new Supplement to 02 series of amendments to UN Regulation No. 117.
21. GRBP adopted ECE/TRANS/WP.29/GRBP/2026/17, as amended by GRBP-84-20, as well as GRBP-83-24-Rev.1, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2027 sessions as draft new Supplement to 04 series of amendments to UN Regulation No. 117.
22. The Co-Chair of the IWG on Wet Grip of Worn Tyres (WGWT) introduced GRBP-84-28. The representative of Japan highlighted the importance of getting a robust test method and appreciated the support of all involved parties. The Chair looked forward to getting a proposal for consideration by GRBP at its forthcoming sessions.