34. The representative from OICA introduced ECE/TRANS/WP.29/GRPE/2022/4 proposing to align UN Regulation No. 24 with UN Regulation No. 85 and ISO 1585:2020. The representatives from France, Germany, Italy, Sweden and the UK supported the proposal.

35. GRPE adopted ECE/TRANS/WP.29/GRPE/2022/4 and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2022 sessions as draft Supplement 8 to the 03 series of amendments to UN Regulation No. 24 (Visible pollutants, measurement of power of C.I. engines (Diesel smoke)).