24. The expert of GTB proposed to clarify the determination of the apparent surface (ECE/TRANS/WP.29/GRE/2021/5). GRE adopted the proposal and requested the secretariat to submit it for consideration and vote at the November 2021 sessions of WP.29 and AC.1 as draft Supplement 7 to the 03 series, draft Supplement 20 to the 04 series, draft Supplement 15 to the 05 series, draft Supplement 15 to the 06 series, draft Supplement 2 to the 07 series and as part of the future 08 (see para. 27 below) series of amendments to UN Regulation No. 48.