Status report on the development of a Hybrid Regulation on ADS Marker Lamps. The task force has largely completed the document, which specifies lighting performance and installation requirements for ADS Marker Lamps on motor vehicles of categories M, N, O, L6 and L7, and includes both component and vehicle approval procedures. The report identifies items requiring GRE guidance on marking legibility, lamp placement and dimensions, geometric visibility angles, substitution of required light-signalling functions, and electrical switching conditions for ADS Marker Lamps.

Meeting minutes from the GRBP Informal Group RD-ASEP held August 31–September 2026 in Berlin, Germany. The group reviewed the status report to GRBP, an issues list, and draft text for UN R51.04. OICA presented a document on the sensitivity of RD-ASEP results and difficulty of assessing worst case vehicle. The Secretary presented updated terms of reference to GRBP for approval. Experts are requested to submit all documents a minimum of 7 days prior to any IWG meeting date.

Proposal to establish revised terms of reference for the IWG RD-ASEP covering vehicles of categories M₁, N₁, and L₃. The group shall modify current regulations to mandate revised RD-ASEP, update Annex 9, delete Annex 7 and update relevant paragraphs in the main body and Annex 3 of UN R51, develop limit curves for different riding situations in UN R41-05, consider relevant transitional provisions, and develop coordination between UN R51 and UN R138. The IWG shall be chaired by Germany with OICA as Secretary for M/N categories and IMMA for L category, and shall present a working document for M₁ and N₁ vehicles by February 2028.

Proposal to amend UN Regulation No. 51 on the noise of M and N category vehicles, introducing comprehensive provisions for measuring and limiting sound emissions. The proposal establishes testing methods for vehicles in motion and at rest, defines sound level limits by vehicle category and power characteristics, and introduces Real Driving Additional Sound Emission Provisions (RD-ASEP) for M1 and N1 vehicles to ensure compliance during typical on-road driving conditions representative of urban and suburban traffic. Transitional provisions permit Contracting Parties to continue approving vehicles under preceding series until a specified date.

Joint OICA and CLEPA presentation of industry-agreed automotive guidelines for life cycle assessment of passenger cars and parts. The guidelines establish a common global methodology for exchanging LCA values across supply chains. Key elements include: functional unit limited to passenger cars with declared units for parts; primary and secondary data approaches; chain of custody covering mass balance and book and claim; energy modelling allowing market-based and location-based approaches; representative vehicle concept for full vehicle LCA reporting; and representative part concept with interpolation for greenhouse gas emissions of declared parts.

Proposal to modify test procedures for the Alternative Method using heavy-duty chassis dynamometer to determine Usable Battery Energy (UBE) and battery durability requirements for electrified heavy-duty vehicles. Changes include specifications for dynamometer settings, test room conditions, cooling fan requirements, driver breaks, battery preparation and pre-conditioning, soak and charge procedures, discharge test cycles for both plug-in electric vehicles (HD-PEVs) and optimized charge-sustaining hybrid electric vehicles (HD-OVC-HEVs), test termination criteria, and measurement device requirements. The document provides test procedures, tables for driver break allowances based on distance and driving time, and detailed formulas for calculating battery energy changes and break-off criteria.

Proposal to add para. 8.1.2. to specify required measurements for the test vehicle including onboard measurement data permissibility and minimum requirements, and add para. 8.1.2.1. to specify measurements specific to TP1 including electrical current and voltage at REESS or inverter inputs, ICE speed, intake manifold pressure, and fuel flow rate, and DC/DC converter measurement options. The amendments ensure consistency with other paragraphs in the regulation such as para. 6.9.2.1. and Annex 1, Appendix 2, 9.1.1.