Proposal to:

• Insert new Appendix A.7 to Annex 4 for the procedure for the measurement of water (H₂O),
• Insert new Annexes 11 and 12 with their appendices for dual-fuel engines with hydrogen as a main fuel,
• Insert new paragraphs 2.1.102 and 2.1.103 defining “Instrument manufacturer” and “Type of analyser”,
• Add new rows to the abbreviations table in paragraph 2.2.2,
• Amend paragraph 3.1.1 to include dual-fuel engines of Type 1A with hydrogen as a main fuel,
• Amend paragraphs 5.6.4, 6.1.4, 8.7.2.3, and multiple appendix paragraphs to accommodate hydrogen-fuelled and dual-fuel engines,
• Amend Table 27 to include dual-fuel hydrogen engines,
• Insert new paragraphs 8.1.13 and 8.1.14 for FTIR and QCL-IR interference checks,
• Insert new paragraphs 9.4.13, 9.4.14, and 9.4.15 specifying requirements for FTIR and QCL-IR analysers,
• Add new Appendix A.7 describing procedures for H₂O measurement using QCL-IR or FTIR analysers,
• Amend Annex 5 title and various paragraphs.

Proposal to amend para. 9.3.2.7. to specify that air to fuel measurement equipment shall be a wide range air to fuel ratio sensor or lambda sensor of Zirconia type mounted directly on the exhaust pipe where exhaust gas temperature is high enough to eliminate water condensation, with sensor accuracy within 3 per cent of reading for less than 2, 5 per cent of reading for 2 to less than 5, and 10 per cent of reading for 5 or greater, calibrated as specified by the instrument manufacturer.

The Informal Working Group on Automotive Life Cycle Assessment decided not to submit the Working Document for the 95th GRPE session. The Mutual Resolution will not be submitted for adoption at the October 2026 GRPE session due to unresolved issues and lack of consensus. The leading team will prepare a status report for October 2026 GRPE describing progress, current status, remaining issues, and proposed way forward. A revised Terms of Reference extending the IWG mandate will be prepared. An additional meeting may be organized to determine the future work programme.

Proposal to revise the weight threshold of M₃ vehicle category from 7.5 tonnes to 12 tonnes, split N-type trucks into three categories with light-duty trucks below 5 tonnes, medium-duty trucks above 5 tonnes and N₃ below 18 tonnes, and heavy-duty trucks above 18 tonnes, adjust year and mileage limits for N₂, N₃ medium-duty trucks to 8 years or 500,000 km, and establish energy throughput requirements: M₂ 120,000 kWh, M₃≤12t 300,000 kWh, M₃>12t 500,000 kWh, N₂≤5t 200,000 kWh, N₂>5t, N₃≤18t 400,000 kWh, N₃>18t 1,200,000 kWh.

China introduces an assessment of low State of Charge Energy requirements for M-type vehicles using data from city buses and coaches. At low SOCE levels, available energy is reduced, requiring increased initial battery energy capacity to meet customer driving range expectations, leading to higher purchase costs and vehicle weight. China provides reasons supporting SOCE performance targets at an 8-year timeframe, including significant differences in vehicle types, operating conditions, business models, and battery specifications that vary by vehicle type, making uniform standards inefficient.

GTR 25 establishes alternative test and verification methods for heavy-duty vehicle energy consumption. China released test method GB/T 18386.2-2022 based on chassis dynamometers using continuous cycle and shortened methods. Test conditions include temperature of 25°C ± 5°C, initial battery SOC of 20%, and pre-conditioning soak and charge for minimum 6 hours and maximum 36 hours. The torque meter method measures road load without disabling regenerative braking, achieving resistance matching within 5% error. Test verification includes vehicle selection across mileage groups 0, 200,000, 400,000, and 600,000 km, with on-board data collection and sensor accuracy consistency analysis post-durability.

Under GTR 25, a feasibility assessment proposes introducing a 5-year mid-term performance requirement threshold together with corresponding mileage and energy-throughput limits as an intermediate verification checkpoint for battery degradation. Based on analysis of State-of-Health data from vehicles with 5-year life and mileage ranging from 250,000 km to 350,000 km, the MPR value is set at 75%, which can cover 98% battery-durability performance. Specific mileage and energy-throughput limits are established for vehicle categories M₂, M₃, N₂, and N₃.

This document proposes establishing a unified global testing method for determining system power and torque of heavy-duty hybrid electric vehicles (HD-HEV) and heavy-duty plug-in electric vehicles (HD-PEV). The proposal addresses the lack of standardized test methods by recommending hub-coupled dynamometer testing for vehicles with central drive systems and chassis dynamometer testing for other configurations. Testing should measure 30-minute continuous maximum power and torque under thermal equilibrium conditions. The document includes technical data from battery energy distribution analysis and recommends China lead formulation of this standard using chassis dynamometer verification.

The document addresses Part C verification of virtual distance for heavy-duty vehicle batteries. OICA reports pilot phase results from Volvo Group and Daimler Truck AG testing measurement procedures and accuracy under driving and stationary conditions. Key findings show measurement accuracy decreases significantly at lower power levels, with deviations of 0.3% to 4% at higher power. PTO system characteristics influence accuracy; internal PTOs performed better than bodybuilder-installed units. The document identifies challenges including formula correction needs, PTO family concept complexity, and proposes further testing before finalizing Part C requirements.

Updates and comments on the draft uniform provisions establishing harmonized methods for the approval of vehicles transformed with electric powertrain retrofit systems for categories M₁–M₃ and N₁–N₃. Requirements cover application for approval, markings on transformation plates, type approval procedures, general and specific requirements for retrofit systems, application range definitions, installer authorization and responsibilities, information to be provided by manufacturers to installers, end-user manuals, conformity of production procedures, modification and extension of approval, withdrawal of approvals, and notification procedures to contracting parties. Specific compliance is required with UN R10, UN R13, UN R13H, UN R85, UN R100, UN R121, UN R134, UN R138, UN R79, UN R155, UN R154, and UN R49, with staged implementation dates for certain requirements such as rechargeable energy storage system compliance from 1 September 2027 onwards and braking system compliance from 1 September 2026 onwards.

Proposal to establish harmonized test procedures for measuring emissions from interior materials, emissions entering vehicle cabins with exhaust gases, and outside air pollutants entering vehicle cabins. The Mutual Resolution applies to category 1-1 vehicles and specifies test modes (ambient, parking, and driving for interior materials; idle and constant speed for exhaust gases; real driving on urban and expressway routes for outside air pollutants), measurement methods for substances including volatile organic compounds, carbonyl compounds, nitrogen oxides, carbon monoxide, particulate matter, and carbon dioxide, vehicle conditioning requirements, test apparatus specifications, quality assurance procedures, and data reporting formats. No emission limit values are set, allowing Contracting Parties to establish limits according to their circumstances.

The agenda includes:

• Transposition of UN-GTR 2 into UN R40 based on WP.29/2026/24 02 series amendments,
• Feedback from the previous session consolidated in EPPR-74-09-Rev.2,
• Maximum power determination discussions referencing prior documentation,
• Battery electric vehicle range determination standardization including SAE J2982 procedures,
• Deterioration factors in GTR 23 durability using EPPR-56-04, EPPR-65-04Rev.1, and EPPR-65-05 analyses.

Technical report on the development of Amendment 2 to UN GTR No. 22. The GTR establishes a harmonized methodology for in-vehicle battery durability through battery health monitoring and minimum performance requirements. Development involved defining state of certified energy and state of certified range metrics, establishing minimum performance requirement values, creating family definitions, developing statistical procedures for on-board monitor verification, and addressing vehicle-to-grid usage through virtual distance calculations. Phase 3 revisions included defining Part C family criteria for virtual distance monitor verification, boundary conditions for verification testing, and alignment with UN Regulations 154 and 83.

Technical report on the development of amendment 2 to UN GTR No. 21. The report describes the procedural background of the Informal Working Group on Electric Vehicle and the Environment (EVE), established in June 2012, and its subsequent work to develop a standalone UN GTR for determining electrified vehicle power. The report outlines revisions approved during 2022 and 2023, including deletion of Annex 3 reserved for a candidate method, addition of a family concept, definition of an additional TP1 method employing onboard signal distribution ratio, allowance of system bench testing for vehicles too powerful for chassis dynamometer testing, and adjustments to soak area temperature specifications, instrumentation requirements, and calculation tolerances.

Technical report on the development of Amendment 1 to UN GTR No. 25 on in-vehicle battery durability for electrified heavy-duty vehicles. The GTR provides a harmonised methodology to monitor battery health over time and introduces minimum performance requirements for battery durability. Development involved approximately 29 IWG meetings over three years with 50 to 60 attendees. The framework centres on minimum performance requirements for in-vehicle batteries, readable on-board battery health monitors, in-use verification procedures, and data collection processes. Three test methods were adopted for measuring usable battery energy: discharge by driving on test track, discharge by driving on road, and discharge using bidirectional power supply system, plus an alternative chassis dynamometer method. The GTR includes an optional annex with minimum performance requirements based on state of certified energy.

The Informal Working Group on EV/HFCV Retrofit Systems held its tenth meeting on 2nd July 2026 in Brussels. The group reviewed progress reports presented to WP.29 Working Parties, referencing GRPE-92-14, GRPE-93-22-Rev.1, GRSP-78-17, GRVA-24-07, GRPE-94-06, and GRVA-25-19. Electrical safety will be reviewed later pending clarification on UN Regulation No. 100. The group excluded UN Regulation No. 155 from draft requirements to avoid cybersecurity complications. Braking requirements for retrofitted vehicles and applicability of UN Regulation No. 13/13-H require further assessment. Further coordination with the EMC Informal Working Group is required. The group distinguished battery range requirements for light-duty vehicles from heavy-duty vehicles.

The agenda includes adoption of the coordination and organization of work with reference to GRPE-92-14, EV/HFCV-02-02, GRPE-93-22-Rev.1, GRSP-78-17, GRVA-25-19, WP.29-199-16, and other documents, electrical safety review, braking, EMC, power determination and battery range, UN draft discussion, and any other business, with a next meeting scheduled for 8th October online.

Japan proposes to add a specific requirement for vehicle speed measurement frequency of 20 Hz in Table A3/1 of Annex 3, consistent with UN R154; revise para. 2.4 to clarify that both constant and transient cycles test methods are permitted; delete redundant text from para. 2.4.1 regarding test cycle requirements; and delete from para. 5.1 the requirement that resolution and method for SOCE availability be determined in agreement with authorities, as these are already specified.

Proposal to:

• Amend para. 2.1.(a) to include fuel cell electric vehicles that have more than one propulsion energy converter,
• Add fuel cell electric vehicle preparation requirements to para. 6.3. requiring run-in in accordance with manufacturers recommendations and at least 300 km of fuel cell run-in with hydrogen refueled in accordance with manufacturers recommendations,
• Amend para. 6.5. to include FCEVs in initial REESS charge requirements,
• Amend para. 6.8.1. to include fuel cell temperature in operational metrics to be monitored and recorded throughout the test,
• Retitle para. 2.6. as Fuel cell architectures, and add paras. 2.6.1., 2.6.2., and 2.6.3. specifying power determination reference points and test procedures for fuel cell architectures.

Proposal to improve efficiency of test methods by adding a reference to SAE J1349 or applicable local regulations, in addition to UN R85 and ISO 1585, to para. 6.1.2. and para. 6.1.2.1., and delete the requirement for Current integration measurement from para. 5.2.1. The additions provide consistency throughout the regulation and clarify that test results obtained in accordance with applicable local regulations are considered valid. The deletion removes an inconsistency whereby only Current integration measurement specifies a frequency of 20 Hz, while other items specify at least 10 Hz, and eliminates inapplicable wording carried over from UN R154.

Proposal for a task force to conduct discussions for drafting the regulation to incorporate the Euro 4-level requirements of UN GTR No. 2 into UN R40. Malaysia and Japan will serve as co-chairs. The Task Force shall review the Euro 4 level requirements and any relevant provisions of UN GTR No. 2 and assess their suitability for transposition into UN R40 under the 1958 Agreement framework. The Task Force shall develop draft regulatory text covering test procedures and test conditions, pollutant limit values and related technical parameters, reference fuels and associated testing requirements, administrative and type approval provisions, and transitional provisions and entry-into-force considerations. Target for submission of informal document for draft UN R40-03 is 96th GRPE scheduled in April 2027.