Proposal to establish uniform provisions for approval of non-original replacement and identical brake pads, drum brake linings, brake discs, and brake drums for vehicles of category M₁, N₁, and N₂ between 3.5 and 5 tonnes maximum mass. The regulation applies brake emission testing procedures and particle emission limits by vehicle category and powertrain technology, with PM10 limits ranging from 3 mg/km for PEV vehicles of categories M₁ and N₁ to 11 mg/km for N₁ Class III and N₂ vehicles. Brake parts must be assigned to families based on characteristics including calliper type, axle location, friction material formulation, disc or drum material, brake disc surface form, pad surface area, and drum diameter. Approval requires testing of a family parent brake assembly and includes conformity of production requirements with annual sampling and statistical verification procedures.

Record of Webex participants attending the TA-52-11 meeting over two days, listing participants’ names, affiliations, and join and leave times for each session.

Explanatory document on proposed amendments to UN R168 to enable real driving emissions testing of hydrogen internal combustion engine vehicles. The work-based approach replaces the CO-based moving averaging window methodology currently inapplicable to hydrogen-fuelled vehicles. Engine speed and torque data replace carbon monoxide to define window size and calculate the RDE/WLTP work ratio. Testing of a light commercial vehicle demonstrates the methodology’s practical applicability under regular and severe driving conditions, with results processed through independent post-processing tools.

Proposal to replace para. 9.3.2.1., replace paras. 9.3.2.8.1. and 9.3.2.9.1., amend paras. 9.3.9.2.2. and 9.3.9.6., and insert new Appendices 10 and 11. The replacements clarify measurement principles, specify that analyser assessment may be conducted by type-approval authorities, designated technical services, or metrological institutes preferably via witnessed testing at the instrument manufacturer premises, and provide protocols and certificate models for analyser assessment. Amendments to para. 9.3.9.2.2. permit alternative humidification techniques and clarify that test gas shall be humidified to a water concentration approximately equal to the maximum water concentration expected during emission testing for all fuels. Amendment to para. 9.3.9.6. specifies that spectral resolution shall have a nominal value ≤0.5 cm⁻¹ to minimise cross interference.

Proposal to amend Annex 2 – Appendix 1 to add para. 1.4.1. specifying user-selectable mode(s) resulting in the lowest recuperation and relevant pre-test procedures for vehicles with a vehicle specific c-factor according to Annex 5, and to delete items not brake emission related including brake circuit configuration, secondary braking system declaration, brake valve specifications, master cylinder type and size, and booster type and size.

Proposal to insert a new definition of hydrogen ICE vehicle, add a note to paragraph 6.1 specifying emissions requirements for 4-phase and 3-phase WLTC analysis, amend paragraphs 8.2, 9.3.1, 9.5, 10.2, 10.6, and 10.7 to clarify trip validity assessment procedures, amend Figure 6 to reflect updated assessment procedures, amend Table A4/1 to add engine fuel flow parameter and clarify mandatory parameters for hydrogen ICE vehicles, insert a new row in Table A5/1 for hydrogen, amend Annex 6 paragraph 3.2.2 to require engine speed and torque recording for hydrogen ICE vehicles, insert hydrogen in Table A7/1, retitle Annex 8, amend Annex 8 paragraph 1 to clarify application of moving averaging window method, and add new Annex 8a establishing an alternative moving averaging window methodology based on engine work for hydrogen ICE vehicles, and amend Annex 11 paragraphs 2, 3.1, and 3.2 and Figure A11/1 to incorporate work ratio calculations for hydrogen fuel tests.

Session agenda for the 100th meeting of the Electric Vehicles and the Environment Informal Working Group on 13 October 2026. The agenda covers status reports and presentations on UN GTR 22, UN GTR 21, and UN GTR 25, with discussion of Euro 7 review clause, readiness monitoring, and regulatory topics including MPRs, energy throughput, and Part C virtual distance verification.

Proposal to amend UN Regulation No. 40 concerning the approval of motorcycles and mopeds with positive-ignition engines regarding emission of gaseous pollutants by establishing comprehensive specifications and test procedures. The regulation applies to vehicles of categories L₃, L₄ and L₅, defining test requirements including Type I (exhaust emissions after cold start), Type II (tailpipe emissions at idle and free acceleration), and Type VII (energy efficiency). Vehicle sub-classification by engine capacity and maximum speed determines applicable test cycles from the WMTC procedure. Emission limits are specified for carbon monoxide, hydrocarbons, and nitrogen oxides. Conformity of production procedures are detailed with sampling and statistical analysis methods. Transitional provisions permit approvals under preceding series and from two years after entry into force allow refusal of first registration for vehicles not meeting the 03 series requirements.

The meeting will address drafting of the new 03 series of amendments, with participants to review and discuss sections 1 to 12 of the draft R40.03, covering scope, definitions, application for approval, approval, specifications and tests, modification of vehicle type, extension of approval, conformity of production, penalties for non-conformity, production discontinuation, technical services details, transitional provisions, and appendices. The base document for drafting is EPPR-73-02.

Proposal to amend UN GTR No. 22 by:

• Introducing requirements for State-of-Certified Energy and State-of-Certified Range monitors,
• Setting Minimum Performance Requirements for battery durability of Pure Electric Vehicles and Off-Vehicle Charging Hybrid Electric Vehicles at 80 per cent energy retention after 5 years or 100,000 km (whichever comes first) and 70 per cent after 8 years or 160,000 km for categories 1-1 and 1-2, with lower thresholds for category 2 vehicles,
• Establishing a two-part in-use verification process comprising monitor accuracy verification and battery durability assessment,
• Introducing a Part C verification procedure for vehicles with V2X functionality or non-traction purposes to verify reported virtual distance accuracy.

Proposal to establish a new Amendment to UN Global Technical Regulation No. 25 on in-vehicle battery durability for electrified heavy-duty vehicles. The GTR provides harmonized methods to determine battery durability performance of HD-PEVs and HD-OVC-HEVs, including requirements for State of Certified Energy (SOCE) monitors, minimum performance requirements expressed as SOCE values at specific vehicle lifetime points, and in-use verification procedures with Parts A and B to verify monitor accuracy and battery durability compliance respectively. The document includes test procedures for usable battery energy determination via driving on test tracks, road driving, bidirectional power supply systems, or chassis dynamometer testing, family definitions for monitor and battery durability verification, vehicle survey requirements, and data collection specifications.

Proposal to amend para. 8.2. to specify that conformity control methods should take into consideration production volumes of the type of tyre at each manufacturing facility with a normal minimum frequency of at least once every two years, and add para. 8.3.3. to establish a minimum frequency of verification tests once every three years, aligning with Schedule 1 of the 1958 Agreement.

The Task Force on Tyre Abrasion convened to address strategic and technical aspects of C3 heavy-duty commercial vehicle tyres. Discussion focused on harmonising market segmentation between European long-haul 22.5" tyres and Japanese all-position tyres under the 1958 Agreement, developing parallel indoor drum and on-road convoy test methods with technological neutrality, and addressing infrastructure funding and test method readiness by March 2030 GRBP adoption and June 2030 WP.29 adoption. Additional topics included Standard Reference Test Tyre incompatibility for trailer axles, simulation tools for tyre type extensions, regulatory definition of tyre type, novel hardware concepts, and the exclusion of retreaded tyres from initial UN R186 scope.

Session report covering brainstorming on C3 test method development, including discussion of tyre segmentation priorities (segments A and C), methodological approaches (open road convoy, drum, accelerated, and single wheel trailer methods), testing capacity and timelines, funding needs, SRTT abrasion range expansion for C1 testing based on Korean data, C2 test campaign status, and TAPP participation criteria. Action items include simulation expert engagement, family approach feasibility review, SRTT range bracketing in UN R186, and drum method equivalence evaluation by JASIC.

Agenda for the 53rd TFTA session on 29 October 2026. Items include approval of previous meeting minutes, outcome from GRPE 95th session, status of TADG drafting C1 and C2 provisions, ETRTO proposals for UN R186 updates, C1 circuit SRTT abrasion level range, C2 test campaign status, C3 brainstorming on virtual testing and tyre type definition optimization, and funding and resource allocation discussion.

Proposal to suppress the loading restriction to 85% of vehicle payload, allow several propulsion energy converters, allow mixing different transmission architectures, include circuit abrasion level measurement possibilities for snow tyres not measuring Severe Snow Tyres, and establish new circuit abrasion level limits based on 17 circuits in the 2026 Confirmation plan. ETRTO is testing acceleration correction, fully loaded vehicles, different energy converters and transmission architectures, alignment specifications for various vehicle types, and load distribution management to reduce test uncertainties and improve method efficiency. An informal document will be proposed in January 2027.

Update proposal for UN R186 to modify load distribution in para. 1.6.2 to apply only to C₁ tyres and add minimal ballast requirement for C₂ tyres, update temperature ranges in para. 1.10.4 for normal and snow tyres, and develop alignment prescriptions for C₂ tyres. The proposal describes a test concept using convoys of up to 4 vehicles with single tyres up to 3.5T GVW under controlled driving conditions to determine tyre abrasion level index. SRTT usage strategy and market assessment to be finalized following temperature testing results.

Status report on the Tyre Abrasion Drafting Group’s progress across sessions 14–16 in 2026. Work includes proposed editorial amendments to UN R186 covering removal of special use tyre references, alignment of symbols between vehicle and drum test methods in Annex 3, updates to ASTM standard references, clarification of introductory provisions, reordering of vehicle requirement paragraphs, splitting of vehicle and circuit requirement paragraphs, updates to test load definition, reworded alternative test program description, removal and correction of duplicate drum control system requirements, and sandpaper surface replacement provisions. Circuit and drum abrasion level ranges require further review by the Task Force on Tyre Abrasion.

Review of UN R186 for opportunities to improve wording.

Proposal to modify the equivalence procedure for tyre test facilities to include circuits meant for severe snow tyres and snow tyres not classified as severe snow tyres, revise the selection criteria for exercise tyres to require an ALI range of at least 0.40 units with approximately even distribution and a specified ratio of normal tyres to snow tyres, and restrict equivalence of facilities designed for testing only normal tyres or specific snow tyre categories to the corresponding tyre category.

The agenda includes presentations on in-vehicle battery durability implementation and battery swapping, a proposal on UBE-certified introduction in templates for information documents and WLTP test reports, status updates on UN GTR 21, UN GTR 22, and UN GTR 25 with priority items and discussion of deadlines for working documents, and OICA comments on these GTRs.

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.

Minutes of a PMP hybrid session held 12 October 2026 at the Palais des Nations in Geneva. Discussion covered amendments to GTR 24 and UN R179 on heavy-duty brake emissions, including new limits for 2030, C-factor measurements, driving modes, brake functions, emission factor calculations, and compliance and conformity of production procedures. Topics included measurement setup, payload factor, test inertia determination methods, inter-laboratory study status with data from 5 labs, and removal of square brackets from GTR text. The group reviewed brake particle emission work from Phase 2 of the DfT programme and preliminary results from a calibration materials inter-laboratory exercise involving 8 labs, recommending continued use of emery oil for annual validation at 23 nm.

Report of the 100th EVE IWG session held October 13, 2026. The group discussed UN GTR 22 status and proposed amendments to UN Regulations Nos. 83 and 154 concerning usable battery energy (UBE) and State of Certified Energy (SOCE) values; UN GTR 21 amendments extending scope to fuel cell electric vehicles (FCEVs), replacing driver/accelerator command terminology, and reducing sampling frequency to 10 Hz, with target completion December 2027; and UN GTR 25 amendments addressing minimum performance requirements (MPRs), energy throughput, and Part C virtual distance verification. Japan proposed amendments to UN Regulation No. 177 for ICE power output references. The F&SC received a one-year mandate extension to continue validation activities and address outstanding issues on smart charging test procedures and key performance indicators.

Draft minutes of the 51st session of the Task Force on Tyre Abrasion held 25 August 2026. The session covered status of the 2026 workplan organizational matters, including TAPP participation, equivalence evaluation of test facilities, and best practice meetings. The TFTA agreed to a consolidated Gantt chart with versioning and regular review. A hybrid brainstorming workshop on the C3 test method is scheduled for 8-9 October 2026 in Brussels and remotely. The Co-chairs will prepare a revised TFTA status report for GRBP’s 84th session.