146. The representative of Italy requested the authorization to develop amendment 4 to the UN GTR No. 3 (ECE/TRANS/WP.29/2022/47). He explained that, after having submitted the proposal to AC.3 in December 2021, Italy informed GRVA in January 2022 of their intention to propose an amendment to the UN GTR to harmonize it with UN Regulation No. 78. The proposal would include requirements for stop lamp activation under regenerative braking and the updating of the references to American Society for Testing and Materials (ASTM) standards for the determination of the Peak Braking Coefficient (PBC). He clarified that, following informal consultations with GRVA and contracting parties, the work plan contained in the document may be updated to take into account relevant GRVA developments and amendments related to stop lamp activation. AC.3 requested the secretariat to keep the document on its agenda for the June 2022 session.