154. The representative of the European Union informed AC.3 that a new Amendment 1 to UN GTR No. 24 had been adopted by GRPE at its January 2024 session as highlighted by the GRPE Chair during his session report.

155. He detailed that this new amendment would include, among others: (i). definitions and provisions for aftermarket brake parts; (ii). Refinement and adjustment of fixed friction share coefficients representing the worst-case scenario in each vehicle category; (iii). Addition of a new Annex with a procedure for the determination of the vehicle-specific friction braking share coefficient on a chassis dynamometer, etc.

156. He confirmed AC.3 would consider this new amendment for adoption and vote at its June 2024 session.

157. He concluded that activities on UN GTR No. 24 are continuing with round robin testing in compliant laboratories and the investigation of the feasibility of the defined method for measuring brake emissions for Heavy Duty Vehicle (HDVs) brakes.