153. The representative of the European Union informed AC.3 that given the IWG on WLTP mandate had expired, no developments had occurred since the recent adoption of Amendment 6 to UN GTR No. 15. He added that two new series to the sister UN Regulation No. 154 had been adopted by GRPE at its November 2021 session and expected to be submitted for consideration and vote at the March 2022 session of WP.29 and AC.1. He suggested to keep this item on the agenda of AC.3 as a new amendment to UN GTR No. 15 might be developed based on the recent work done on UN Regulation No. 154. AC.3 agreed with this proposal.