51. The expert from SAE International presented GRVA-13-28/Rev.1, introducing GRVA-13-26 and GRVA-13-29, proposing updates to references to ISO/SAE 21343 in the interpretation document for UN Regulation No. 155 and proposing clarifications in UN Regulation No. 155 regarding the authentication of Global Navigation Satellite System (GNSS) messages. GRVA requested the secretariat to distribute GRVA-13-26 and GRVA-13-29 with official symbols at the next session with the necessary changes to produce: (i) an amendment proposal to UN Regulation No. 155 and (ii) an amendment proposal to the interpretation document.

64. The expert from SAE International recalled his presentation at the previous session of GRVA. He introduced ECE/TRANS/WP.29/2022/17 and ECE/TRANS/WP.29/2022/18 (GRVA-14-06 provides a version of ECE/TRANS/WP.29/2022/18 with tracked changes), aimed at seeking clarification of the requirements of Annex 5, regarding the authentication of Global Navigation Satellite System (GNSS) messages. The proposals received comments from CLEPA and OICA (GRVA-14-11). GRVA agreed to transmit these four documents listed in this paragraph to IWG on CS/OTA for further discussion.