23. GRSP resumed discussion on a revised proposal tabled by the expert from OICA to incorporate provisions on hydrogen-fuelled vehicles into UN Regulation No. 94, to harmonize UN Regulation No. 94 with UN GTR No. 13, Amendment 1 (GRSP-73-34 superseding ECE/TRANS/WP.29/GRSP/2023/22). GRSP adopted ECE/TRANS/WP.29/GRSP/2023/22 as amended by annex V to the session report. The secretariat was requested to submit the proposal as the draft 05 Series of Amendments to UN Regulation No. 94 for consideration and vote at the November 2023 sessions of WP.29 and AC.1.