The 98th EVE IWG session held virtually on July 15, 2026, adopted the agenda and discussed Phase 4 priorities for UN GTR 22, including Minimum Performance Requirements, State of Certified Range, conditioning cycles, and mutual recognition. Japan proposed sharing Part C verification results with all Contracting Parties. The IWG reviewed UN GTR 21 and UN GTR 25 status, covering MPRs, energy throughput, virtual distance verification, and battery replacement provisions. OICA will present their MPR position at EVE 100 and share Part C verification results at EVE 99. Japan will consult on hosting 2027 meetings targeting the week of February 15th.

The agenda addresses UN GTR 22, UN GTR 21, and UN GTR 25, with discussions on fuel cell vehicle proposals, open items, verification results, alternative test methods, and battery replacement provisions. A reminder notes that UN GTR 25 amendment 2 must be submitted to GRPE-96 by December 2026.

Proposal to revise provisions and formulas in GTR 22 Annex 3, paras. 2.1.2. and 3.1.2., UN R154-04 Annex C1, Appendix 2, paras. 2.1.2. and 3.1.2., and UN R83-09 Appendix 5, para. 3.1.2. to make UBE_certified values positive and select the maximum absolute value. The document EVE-63-11e addresses concerns that when the interpolation method is applied under GTR No. 15 / UN R154, UBE_certified values become negative, contrary to regulatory intent. Revisions ensure UBE_certified is determined by selecting the maximum absolute value amongst vehicle H, vehicle L, and vehicle M where applicable.

Proposal to establish minimum performance requirements for in-vehicle battery durability of pure electric vehicles and off-vehicle charging hybrid electric vehicles, requiring manufacturers to install State-of-Certified Energy and State-of-Certified Range monitors, set minimum allowable SOCE values of 80% for categories 1-1 and 1-2 vehicles and 75% for category 2 vehicles at 5 years or 100,000 km (whichever comes first) and 70% and 65% respectively at 8 years or 160,000 km, implement a two-part in-use verification process to verify monitor accuracy and battery durability through statistical methods and remote data collection, allow manufacturers to declare higher performance requirements, and include verification of reported virtual distance for vehicles with V2X functionality or non-traction purposes.

Proposal to establish a harmonized method for determining system power ratings of hybrid electric vehicles and pure electric vehicles with multiple propulsion energy converters. The GTR specifies two test procedures (TP1 and TP2) to measure power at defined reference points analogous to conventional engine output shafts. TP1 measures electrical power and estimated ICE power; TP2 measures torque and speed at axles or wheel hubs. The procedure identifies reference points based on powertrain architecture, requires manufacturers to provide verifiable K factors for energy conversion efficiency, specifies measurement accuracy requirements, and includes validation criteria. The GTR applies to vehicles in categories M₁–M₂ and N₁–N₂ with maximum laden mass not exceeding 3,500 kg, excluding fuel cell vehicles.

Proposal to establish harmonised methods for determining in-vehicle battery durability performance of heavy duty pure electric vehicles and heavy duty off-vehicle charging hybrid electric vehicles. The GTR introduces a State of Certified Energy monitor to track battery health over time, defines minimum performance requirements as optional provisions by contracting parties, and specifies in-use verification procedures in two parts: Part A verifies monitor accuracy through measurement of usable battery energy using four alternative test methods, and Part B verifies battery durability against minimum performance requirements through remote data collection from vehicle samples. Virtual distance calculations account for energy used in vehicle-to-grid, power take-off, and non-traction applications.

This regulation proposes uniform provisions for the approval of electric powertrain retrofit systems (EPRS) intended for the conversion of vehicles of categories M and N to electric propulsion. It establishes requirements for EPRS design, installation by authorized installers, type approval procedures, application ranges, markings, conformity of production, and modification or extension of approvals. Specific requirements for compliance with applicable UN Regulations are defined, including electromagnetic compatibility, braking, power measurement, rechargeable energy storage systems, and mass and dimension limits. The regulation applies to both pure electric vehicles (EV) and hydrogen fuel cell vehicles (HFCV).

Report of the 99th session of the EVE IWG held September 8-9, 2026, covering discussions on UN GTR 21, UN GTR 22, and UN GTR 25. Topics included Japan’s proposal to revise UBE certified value calculations, China’s proposal to incorporate fuel cell vehicles under GTR 21, China’s proposals for vehicle category modifications and minimum performance requirements under GTR 25, Japan’s proposals for measurement requirements under GTR 21, assessment of alternative test methods for GTR 25, and open items across all three GTRs. The group confirmed target dates of March 2028 for GTR 21 and GTR 25 amendments.

Minutes of the eleventh meeting of the IWG on EV/HFCV Retrofit Systems held on 9 September 2026. The group adopted the provisional agenda and reviewed the draft UN Regulation on EV/HFCV retrofit systems. Key discussions addressed the regulatory concept for approval of the Electric Powertrain Retrofit System combined with installation requirements and vehicle testing, vehicle scope including possible exclusion of older vehicles and those subject to UN Regulations Nos. 155 and 156, and confirmation that HFCV provisions would remain as placeholders for later development. The updated working document will be circulated before submission to GRPE in October 2026.

Proposal for a new UN Regulation establishing uniform provisions for type approval of Electric Powertrain Retrofit Systems (EPRS) designed for conversion of vehicles of categories M and N to full electric propulsion. The regulation does not apply to vehicles holding approval under UN R155 or UN R156. It sets out requirements for EPRS manufacturers, installers, markings, approval procedures, general and specific technical requirements for retrofit systems, installer authorization and training, documentation to be provided by manufacturers, conformity of production, modification and extension of approvals, and penalties for non-conformity.

Status of the A-LCA informal group activities and schedule for A-LCA Subgroup 2 meetings.

Agenda for a PMP webex meeting on 29 September 2026 to review meeting minutes, overview amendments to GTR 24 and UN R179 on brakes across multiple task forces covering layout and testing topics, vehicles limited speed, brake replacement parts, and electromechanical brakes, discuss GTR and UN R heavy-duty brakes, and address any other business.

Draft proposal to:

• Introduce requirements for State-of-Certified Energy and State-of-Certified Range monitors that operate for the full lifetime of vehicles,
• Set minimum performance requirements for battery durability expressed as SOCE values of 80 percent at 5 years or 100,000 km and 70 percent at 8 years or 160,000 km for categories 1-1 and 1-2, and 75 percent and 65 percent respectively for category 2 vehicles,
• Establish a two-part in-use verification process with Part A verifying monitor accuracy through statistical method on minimum 3 vehicles and Part B verifying battery durability through remote collection of on-board values from sample of at least 500 vehicles with pass decision requiring 90 percent or more of values above MPR,
• Introduce Part C verification of reported virtual distance for V2X applications with pass/fail decision based on statistical procedure with maximum 4 vehicles.

Overview of working documents for the 95th session of GRPE, listing five working documents on new GTR for heavy-duty brake emission, UN R179 second supplement, GTR 24 third amendment, vehicles with limited speed for UN R179 and GTR 24, and new UNR on emissions covering brake replacement parts, with informal documents to follow from clean working documents.

Working draft proposal to:

• Establish harmonized methods to determine in-vehicle battery durability performance of heavy-duty pure electric vehicles and heavy-duty off-vehicle charging hybrid electric vehicles,
• Introduce State-of-Certified-Energy monitors that estimate battery health throughout vehicle lifetime,
• Define minimum performance requirements for battery durability in an optional annex,
• Establish test procedures for usable battery energy determination via test track driving, on-road driving, bidirectional power supply systems, or chassis dynamometer testing,
• Implement a two-part in-use verification process verifying monitor accuracy and battery durability compliance through statistical sampling,
• Collect field data to inform future revisions of performance requirements.

Proposal to improve and correct the procedure for laboratory measurement of brake emissions for light-duty vehicles of categories M₁ and N₁. The regulation establishes requirements for brake particle emission testing including test setup, the WLTP-Brake cycle test procedure, cooling air adjustment, brake bedding, and emissions measurement sections. Compliance is demonstrated through brake corner emission family testing with PM₁₀ and SPN₁₀ measurements. Conformity of production is verified through periodic sampling and statistical evaluation. Type approval requires demonstration that whole vehicle brake emissions calculated from individual axle emissions multiplied by friction braking share coefficients do not exceed limits of 3 mg/km PM₁₀ for M₁ and N₁ vehicles and 5 mg/km for N₁ Class III and N₂ vehicles.

Editorial corrections to the Appendix and reference to Annex 4.

Meeting minutes documenting PMP discussions on amendments to Brakes GTR 24 and UN R179, including TF3a layout and testing topics, TF3b vehicles limited speed work, TF3c brake replacement parts with a new UNR to be introduced, and TF4 electromechanical brakes with no further progress. GTR and UNR informal documents on HD brakes were presented with trailers removed from scope, open points on PM Emission Factor units, caliper position, test input parameters, and cooling air flow value addressed, and a 3-month delay in round robin testing reported.

Draft report of the 75th meeting of the EPPR informal working group on environmental and propulsion performance requirements of L-category vehicles. The group adopted the previous meeting’s report and agenda. A Task Force was established to continue the transposition of UN-GTR 2 into UN-Regulation 40, with the first meeting scheduled for 9 October 2026. The group exchanged information on maximum power determination for two-wheelers, battery electric vehicle range determination standardization using SAE J2982 and Chinese standard GB/T 24157-2017, and deterioration factors in GTR 23 on durability. Subsequent EPPR meetings and Task Force sessions are scheduled through June 2027.

Draft agenda for the 76th EPPR Informal Working Group Meeting on Environmental and Propulsion Performance Requirements of L-category vehicles, scheduled for 13 October 2026. The agenda covers adoption of the previous meeting’s report, transposition of UN-GTR 2 into UN Regulation 40 with feedback from multiple countries, information exchange on maximum power determination for two-wheelers, battery electric vehicle range determination standardization, deterioration factors in GTR 23, and other business items.

Provisional agenda for the twelfth meeting of the IWG on EV/HFCV-RS to be held on 28 September 2026. The agenda covers adoption of the agenda, approval of minutes from the previous meeting, coordination and organization of work, power determination and battery range, UN draft documents, and any other business, with the next meeting scheduled for 8 October 2026.

Presentation on single-wheel trailer technology for measuring tyre wear on C1, C2, and C3 tyres. The document describes a narrow trailer with one measuring wheel that eliminates vehicle-specific influences such as axle geometry, suspension kinematics, and drivetrain concepts to enable direct comparison of tyres from different manufacturers. The trailer uses a Cardan joint coupling that transmits roll movement from the towing vehicle while allowing pitch and yaw movements, with adjustable ballast positioning to control wheel load. Comparison tables show that the single-wheel trailer method produces results similar to outdoor convoy testing for lateral force, braking force, and camber while avoiding wheel load transfer effects present in conventional vehicle testing.