8. On behalf of the Informal Working Group (IWG) on UN Regulations Nos. 51 and 59, the expert from OICA introduced further proposals for amendments to the 03 series of amendments to UN Regulation No. 51 (ECE/TRANS/WP.29/GRB/2015/3 and Corr.1). The expert from Japan expressed concerns about a relaxation clause for a specific category of vehicles included in these proposals (GRB-61-05) and proposed an alternative wording. Further corrections were suggested by the experts from the Netherlands (GRB-61-08), Spain, the European Commission and OICA. Finally, GRB adopted the proposals, as amended by Annex III to this report.

9. GRB recalled that, at its previous session, it had adopted the draft 03 series of amendments to Regulation No. 51 (ECE/TRANS/WP.29/GRB/2014/5, ECE/TRANS/WP.29/GRB/58, para. 5 and Annex III) which had subsequently been submitted to WP.29 and AC.1 for consideration and vote at their March 2015 sessions as document ECE/TRANS/WP.29/2015/3. With regard to the additional proposals adopted at this session (para. 8 above and Annex III to this report), GRB noted two options for their processing:

• (i) submit them separately to WP.29 and AC.1 for consideration and vote at their June 2015 session as a draft Supplement 1 to the 03 series of amendments to Regulation No. 51; or
• (ii) combine them with the 03 series of amendments to Regulation No. 51 (ECE/TRANS/WP.29/2015/3) in a single document and submit it to WP.29 and AC.1 for consideration and vote at their June 2015 sessions. In this case, WP.29 and AC.1 would be requested not to consider document ECE/TRANS/WP.29/2015/3 in March 2015.

10. GRB supported option (ii) and mandated its Chair to report about this decision to WP.29, AC.1 and the Administrative Committee for the Coordination of Work (AC.2) at their sessions in March 2015. GRB also noted that IWG on UN Regulations Nos. 51 and 59 had completed its tasks and that the extension of its mandate was not necessary.