23. On behalf of TF TPMSTI, the expert from EC presented a proposal for a new series of amendments (ECE/TRANS/WP.29/GRBP/2020/19, GRBP-72-18). GRBP adopted the proposal, as amended by Annex X of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a new 01 series of amendments to UN Regulation No. 141. During the adoption, the expert of EC recalled his intention to seek WP.29 guidance on the transitional provision about granting type approvals according to the preceding series of amendments (see para. 4 above).