GRBP will be informed about the activities of the Informal Working Group on Real Driving – Additional Sound Emission Provisions (IWG RD – ASEP) and its Subgroup on UN Regulations Nos. 51 and 138.
GRBP will consider amendment proposals that were drafted by the Subgroup with the aim to introduce a “default mode” and to specify the requirements for Enhanced Exterior Sound (EES), with the corresponding transitional provisions, and to draw a limit curve to introduce electric vehicles (EVs) and hybrid electric vehicles (HEVs) that can be propelled with no internal combustion engine operating in the scope of ASEP (Annex 7).
| GRBP/2026/4 | UN R51: Proposal for a Supplement 11 to the 03 series of amendments |
GRBP is also invited to address amendment proposals tabled by the experts from the International Organization of Motor Vehicle Manufacturers (OICA) with the aim to close a regulatory gap in the short term until the new 04 series of amendments enters into force.
| GRBP/2026/14 | UN R51: Proposal for a Supplement 11 to the 03 series of amendments |
GRBP will consider clarifications prepared by the experts from OICA.
GRBP is invited to address draft amendments submitted by the experts from the International Organization for Standardization (ISO) to reference the latest version of standard ISO 362-3 (Indoor testing).
| GRBP/2026/5 | UN R51: Proposal for a Supplement to the 03 series of amendments |