28. GRB considered document GRB-59-01 in which the secretariat proposed to correct the reference to Annex 3 of UN Regulation No. 41 in paragraph 8.8.2.1.2. of the Consolidated Resolution (R.E.3) as well as to draw the attention of the Working Party to the fact that the margin of 5 dB(A) defined in paragraph 8.8.2.2., in order to take into account the possible instrumental and measurement errors, substantially exceeds the respective margins of 1 or 3 dB(A) set out in Regulations No. 51, 41 and 63. The experts from France, Germany, Sweden, IMMA, ISO and OICA pointed out that the figure of 5 dB(A) in paragraph 8.8.2.2. takes into account the disturbances and scatter of measurements performed under real-life conditions, in uncertain acoustic environment (e.g. side of a road) and by untrained staff (e.g. road police), while the margin of 3 dB(A) is intended for laboratory conditions and trained staff. GRB decided to leave the figure of 5 dB(A) in paragraph 8.8.2.2. of R.E.3 unchanged.

29. Finally, GRB considered ECE/TRANS/WP.29/GRB/2013/9 tabled by the expert from the Russian Federation. GRB agreed, as proposed by the expert from IMMA, to delete, in the new paragraph 8.8.2.1.2., the references to new categories of vehicles L 6 and L 7 which are not yet covered by UN Regulation No. 9. Finally, GRB adopted ECE/TRANS/WP.29/GRB/2013/9, as amended by Annex III to this report. The secretariat was requested to submit it to WP.29 and AC.1 for consideration and vote at their June 2014 session as draft Amendment 5 to R.E.3.