Proposal to align UN R51 with ISO 5130:2019 and thereby set requirements for the microphone position as a function of the exhaust outlet configuration.
6. On behalf of the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP), the expert from Germany proposed clarifications and corrections (ECE/TRANS/WP.29/GRBP/2019/13). The expert from OICA suggested further modifications (GRBP-70-06). The expert of ISO proposed updates according to the latest revision of standard ISO 5130:2019 (GRBP-70-08-Rev.1). To facilitate the discussion, the expert from OICA prepared a consolidated version of amendments (GRBP-70-26-Rev.1). The expert from Italy pointed out the need for a transitional provision. Finally, GRBP adopted the proposal, as contained in Annex II of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2020 sessions as a draft Supplement 6 to the 03 series of amendments to UN Regulation No. 51.