116. The expert from CLCCR recalled the purpose of ECE/TRANS/WP.29/GRVA/2023/3. He requested (GRVA-15-33), following discussions with OICA, to postpone the consideration of this topic to the next session of GRVA. GRVA gave its consent.

117. The expert from the United Kingdom of Great Britain and Northern Ireland introduced GRVA-15-08, with a proposal to amend Annex 18 of UN Regulation No. 13, aimed to align where appropriate the text in UN Regulation No. 13 with that of Annex 6 to UN Regulation No. 79 (Steering Systems) and to improve consistency in the interpretation of the requirements of that annex. Following discussions, GRVA requested the secretariat to distribute the document with an official symbol at its May 2023 session.

120. The expert from the Netherlands presented GRVA-15-29 introducing ECE/TRANS/WP.29/GRVA/2023/4, an amendment proposal to UN Regulation No. 78 aimed at inserting requirements for Complex Electronic Control Systems and aligned with those for passenger cars. He recalled the context of the proposal tabled, following the adoption of brake light activation criteria for automatically commanded braking functions at the last session. He announced that the alignment (GRVA-15-41) of the proposed text with those developed for UN Regulation No. 13 would be performed in a second step.

121. The expert from United Kingdom of Great Britain and Northern Ireland presented GRVA-15-41, proposing amendments to ECE/TRANS/WP.29/GRVA/2023/4 and aimed at introducing the new provisions for the audit of electronic control systems that have been developed for UN Regulation No. 13 and its Annex 18 (see GRVA-15-08).

122. Following discussion, GRVA adopted ECE/TRANS/WP.29/GRVA/2023/4 as amended by GRVA-15-57 and requested the secretariat to submit it as a proposal for the 06 series of amendments to UN Regulation No. 78 (braking of Category L vehicles) to WP.29 and AC.1 for consideration and vote at their June 2023 sessions.

109. The expert from UK requested to keep ECE/TRANS/WP.29/GRVA/2023/10 and GRVA-16-41 on the agenda until the next session, as they would be further discussed and finalised by SIG on EMB. GRVA agreed to this proposal.

96. The representative of the United Kingdom of Great Britain and Northern Ireland, Chair of the Special Interest Group on Electromechanical Braking, presented the status report of the group (GRVA-17-19). He alerted GRVA on the ambitious schedule proposed by the group as well as on the concept being developed, which might require careful review by the delegations. The representative of CLEPA provided details on how the industry is envisaging such systems. The group invited GRVA to reflect on the fact that these new braking systems may not measure but deduce the level of energy available for braking, may not have an energy reserve strictly dedicated to braking, may use an energy reserve that is available to several vehicle systems as an energy storage device for the braking system.

97. Several delegations offered comments, stating that an indirect deduction might be acceptable if a robust validation is available and asking the group to envisage limitations in case the energy reserved could be used by non-safety critical systems. They also inquired what the group would do to address the case were several safety critical systems e.g. steering an braking would share the same energy reserve. GRVA supported the path taken by the group so far.

98. The representative of the United Kingdom of Great Britain and Northern Ireland clarified, upon request, that the consideration their amendment proposal to Annex 18 of UN Regulation No. 13 with the requirements for electronic vehicle control systems (ECE/TRANS/WP.29/GRVA/2023/10) could be postponed until the January 2024 session, while the EMB documents are being developed.

99. The representative of CLEPA clarified that the consideration of the amendment proposal to UN Regulation No. 13 to consider the approval of the so-called e-axles (ECE/TRANS/WP.29/GRVA/2023/3) can be postponed until the January 2024 session of GRVA.