107. The expert from France introduced ECE/TRANS/WP.29/GRVA/2023/2, a proposal to mandate the fitment of an electronic stability function on N₃ concrete mixer trucks with four axles. He highlighted that, given the difficulty to refer to “concrete mixers” in the Regulation, the current proposal was to refer to and include all vehicles with four axles and two power driven rear axles in the scope of the mandatory installation of electronic stability function.

108. GRVA adopted ECE/TRANS/WP.29/GRVA/2023/2, as amended by GRVA-15-56 as draft proposal for the 13 series of amendments to UN Regulation No. 13 (heavy vehicle braking) and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote in June 2023.

81. The expert from France introduced ECE/TRANS/WP.29/GRVA/2022/14 as amended by GRVA-13-39, aimed to require the fitment of four axles commercial vehicles over 25 tons with vehicle stability function. The expert from OICA introduced GRVA-13-23 containing an alternative proposal addressing the concern raised by the expert from France and based on their statistical review of the configuration of four axle vehicles. He presented GRVA-13-20 containing elements justifying their alternative proposal.

82. GRVA agreed to keep GRVA-13-23 and GRVA-13-39 on the agenda for the session in September 2022.