6. On behalf of the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP), the expert from Germany reported on the IWG ASEP activities (GRBP-71-25). He also introduced in detail the future revision of ASEP in UN Regulation No. 51, based on the concept of real driving and sound expectation model (GRBP-71-24).

11. The expert from Poland proposed to allow surfaces other than ISO 10844 for measurements in standstill condition (GRBP-71-28-Rev.1). GRBP adopted the proposal, as contained in Annex V, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2020 sessions as a draft Supplement 2 to the 01 series of amendments to UN Regulation No. 138.