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.

6. The expert from China raised questions on choosing tyres for the 03 series of amendments to UN Regulation No. 51 as well as for UN Regulations Nos. 30, 54 and 117 on tyres (GRB-68-02). The experts from the Russian Federation and ETRTO commented on the raised issues and invited the expert from China to discuss them bilaterally.