12. GRE recalled its previous discussions on use of the Unique Identifier (UI) in the UN Regulations under GRE purview. The expert of IWG SLR presented their conclusion that UI would be needed for UN Regulations Nos. 65, 148, 149 and 150, while consensus was not found for UN Regulation No. 45 (GRE-89-03). The expert from CITA shared his thoughts on how the concept of UI could function in practice (GRE-89-11). In his view, UI would be required for UN Regulation No. 65 and possibly for UN Regulations Nos. 148, 149 and 150, if the space available on the products would not be sufficient for engraving traditional approval markings. GRE also took note that other WP.29 Working Parties (GRs) were not in favour of using UI in their UN Regulations.

32. GRSG recalled that its experts were invited to provide further comments and indications on which UN Regulations would not be affected by the Unique Identifier (UI). GRSG also noted that it was expected to complete a tentative list provided at its previous sessions. The expert from CITA introduced GRSG-126-27 to provide clarity on the use of the different markings of a device corresponding to a single UI.

33. Finally, GRSG adopted GRSG-126-26-Rev.2 tabled by the experts from CITA and CLEPA and agreed to send it to the IWG on Database for the Exchange of Type Approval documentation as the final deliberation of GRSG on this subject.

109. The representative of CITA presented (GRVA-17-46) some thoughts on the Unique Identifier. He mentioned the benefits as well as the disadvantage related to the use of UI (e.g., more time needed to obtain the same information as the one provided by physical markings) and proposed ideas to clarify the concept. GRVA thanked him for these observations.