12. GRB considered additional proposals for the 02 series of amendments to Regulation No. 59 prepared by IWG on Regulations Nos. 51 and 59 (ECE/TRANS/WP.29/GRB/2015/4). GRB adopted these proposals, as amended by Annex IV to this report, and mandated the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as a draft Supplement 1 to the 02 series of amendments to Regulation No. 59.

9. On behalf of the IWG on UN Regulations Nos. 51 and 59, the expert from OICA presented a revised proposal for the 02 series of amendments to UN Regulation No. 59 (ECE/TRANS/WP.29/GRB/2014/6 and GRB-60-01). He pointed out that this proposal was also aligned with EU Regulation No. 540/2014 on the sound level of motor vehicles and of replacement silencing systems. GRB adopted this proposal, as amended by Annex IV to the present report, and mandated the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2015 sessions.