11. The expert from OICA proposed amendments to Regulation No. 51 with the aim to ensure transparency during the type approval process in situations where the manufacturer could either use mechanical or electronic devices to control the gear shift, or take measures to avoid accelerations greater than 2.0 m/s² (ECE/TRANS/WP.29/GRB/2018/2 and GRB-67-17). The proposal received questions and/or comments from the experts of China, France, Germany, Japan and ISO. GRB adopted the proposals, as contained in Annex III to the session report, and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their June 2018 sessions as a draft Supplement 4 to the 03 series of amendments to Regulation No. 51.

8. The expert from ISO presented revised proposals that introduced into Regulation No. 51 an option of indoor testing, according to standard ISO 362-3 (ECE/TRANS/WP.29/GRB/2018/3). This proposal received comments from the experts of China, France (GRB-67-11), Germany, Netherlands, Russian Federation (GRB-67-01), Sweden and OICA. Following an in-depth discussion, GRB adopted the proposals, as amended (Annex II of the session report), and requested the secretariat to submit them to the World Forum for Harmonization of Vehicle Regulations (WP.29) and to the Administrative Committee (AC.1) for consideration and vote at their June 2018 sessions as a draft Supplement 4 to the 03 series of amendments to Regulation No. 51.

8. The expert from ISO presented revised proposals that introduced into Regulation No. 51 an option of indoor testing, according to standard ISO 362-3 (ECE/TRANS/WP.29/GRB/2018/3). This proposal received comments from the experts of China, France (GRB-67-11), Germany, Netherlands, Russian Federation (GRB-67-01), Sweden and OICA. Following an in-depth discussion, GRB adopted the proposals, as amended (Annex II of the session report), and requested the secretariat to submit them to the World Forum for Harmonization of Vehicle Regulations (WP.29) and to the Administrative Committee (AC.1) for consideration and vote at their June 2018 sessions as a draft Supplement 4 to the 03 series of amendments to Regulation No. 51.

11. The expert from OICA proposed amendments to Regulation No. 51 with the aim to ensure transparency during the type approval process in situations where the manufacturer could either use mechanical or electronic devices to control the gear shift, or take measures to avoid accelerations greater than 2.0 m/s² (ECE/TRANS/WP.29/GRB/2018/2 and GRB-67-17). The proposal received questions and/or comments from the experts of China, France, Germany, Japan and ISO. GRB adopted the proposals, as contained in Annex III to the session report, and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their June 2018 sessions as a draft Supplement 4 to the 03 series of amendments to Regulation No. 51.

5. The expert from the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP) proposed amendments aimed at updating and revising Supplement 4 to the 03 series of amendments to UN Regulation No. 51 (ECE/TRANS/WP.29/GRB/2018/10). GRB adopted the proposals and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their March 2019 sessions as a draft Supplement 5 to the 03 series of amendments to UN Regulation No. 51, subject to the following modifications:

Page 2, lines 2 and 3, for Figure 3c read Figure 4c.

Page 3, table, row 3, last column, for l_veh read l.

7. GRB also noted that, during the adoption of Supplement 4 to the 03 series of amendments, a sentence in Annex 3, paragraph 3.1.2.1.4.2. had been deleted by mistake (ECE/TRANS/WP.29/GRB/2019/9). To restore the sentence, GRB requested the secretariat to issue a corrigendum to the Supplement which would be deemed applicable ab initio. GRB also adopted a minor editorial correction to Annex 3, paragraph 3.1.2.1. (ECE/TRANS/WP.29/GRB/2019/8).

6. The Chair of the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP) proposed to introduce transitional provisions for Supplements 4 and 5 to the 03 series of amendments to UN Regulation No. 51 (ECE/TRANS/WP.29/GRB/2019/9 and ECE/TRANS/WP.29/GRB/2019/11). GRB adopted these proposals and recalled that Supplement 5 would still be considered by WP.29 at its session in March 2019 (ECE/TRANS/WP.29/2019/4). To speed up the amendment process, GRB requested the secretariat to issue a revised version of ECE/TRANS/WP.29/2019/4 with the adopted transitional provisions.