Conversion of UN GTR24 into a UN R

Proposal to improve FTIR/QCL Analyser Examination (Para. 9.3.2.8.1, 9.3.2.9.1, 9.3.2.10, Appendices 10–11), including expanding the examination authority to include type-approval authorities and technical services, requiring witnessing of the testing at the instrument manufacturer’s facility, and introducing new appendices providing an examiner template and a verification certificate format, and to permit other techniques for the water quench check (Para. 9.3.2.9.9) to address the adverse effects of H₂O and CO₂ on the CLD’s NOx response and align with the provisions of 40 CFR 1065.750(e)(5).

Proposal to clarify the selection of the wheel load among vehicles with identical brake assemblies for particle emissions testing.

Proposal to clarify Annex 3, table A3/1 regarding minimum type-approval requirements for Euro 6e, Euro 6e-bis, and Euro 6e-bis-FCM under UN R83 by specifying the relevant series of amendments for UN R24, R85, and R168, which were omitted when the 08 Series was created as no new amendments were anticipated at the time. A minor editorial correction is also included.

Proposal to correct several outdated references following structural changes to UN R154 (04 series of amendments), including updated appendix numbering in paragraphs 2.47, 2.48, and Annex 5, removal of “worst case certified energy consumption Part B family” from Table 4 reporting requirements, and correction of the vehicle survey reference to reflect its relocation to the 9 Series of amendments to UN R83.

Proposal to delete two paragraphs relating to “Operating Mode Switch” that were overlooked when that concept was removed from Regulation No. 83, from both the manufacturer’s information document (Annex 1) and the approval certificate addendum (Annex 2). The same documentation requirements were removed from the 08 series of amendments (during GREP-93), differing only in paragraph numbering.

Proposal clarifies the text relating to On-Board Diagnostics (OBD)

Proposal brings clarity to references and to correct copy & paste mistakes and possible misinterpretations related to in-vehicle battery durability and low
temperature.

Proposal clarifies the OBFCM requirements

Proposal for change in transitional provisions to take into considerations of the lifetime value retention status

Current status of calculation method and component dynamometer tests

Provides corrections and updates to the requirements, including to reflect the fact that requirements for manipulation devices and manipulation strategies

This proposal updates provisions for automated vehicles and automated driving systems.

Industry guidelines developed jointly by CLEPA and OICA to provide a harmonised methodology for determining the carbon footprint of passenger cars through their full life cycle, from material extraction through production, use, and end-of-life. The guidelines establish four levels of assessment based on data granularity and intended application (ranging from public policy analysis to detailed supply-chain reporting), with fixed methodological approaches for Levels 3 and 4. They specify treatment of GHG emissions including biogenic carbon, land use change, and fossil emissions; define data quality requirements including primary data collection and allocation procedures; and establish system boundaries across material production, parts and vehicle assembly, use, and end-of-life stages, employing the Circular Footprint Formula for material recycling assessment.

Joint OICA and CLEPA workgroup presentation on industry guidelines for life cycle assessment of passenger cars and parts. The guidelines establish a common global methodology for LCA data exchange along the supply chain, independent of regulatory development. Key technical points include defining functional units for passenger cars and a declared unit for parts, specifying primary and secondary data requirements, addressing chain of custody through aligned models and mass balance approaches, allowing mixed energy modelling approaches with market-based modelling for decarbonisation efforts, introducing representative vehicles for full vehicle LCA reporting, and introducing representative parts to simplify supplier reporting to OEMs.

Proposal to amend Annex 2, point 0.8. of Section I to add a footnote clarifying that documentation of name(s) and address(es) of assembly plant(s) shall only be applicable when the manufacturer’s information document in accordance with Part 2 of Annex 1 was supplied for type-approval purposes. UN Regulation No. 168 includes two versions of the manufacturer’s information document; Part 1 applies when all vehicles covered are also type-approved according to UN Regulation No. 154, while Part 2 applies when at least one vehicle is not covered by UN Regulation No. 154 type-approval.

Proposal to amend Annex 4, paragraph 9.8.3. to clarify that the ‘OBM transmission hash validity status’ indicates hash function computation completion, and amend Annex 5, paragraph 2.2.4.3. to correct quotation mark placement for consistency with other parts of the Regulation.

Proposal to amend para. 14.1., 14.2., 14.3., and 14.4. to update references from UN GTR No. 15 to UN Regulation No. 154 and introduce declarations of compliance options, amend Annex 4a paras. 5.1. and 2. to reference UN R154, amend Appendix 7B paras. 1. and 2.1. and footnote 1 to reference UN R154, amend para. 12. to introduce transitional and special provisions, insert new paras. 12.3.1., 12.3.2., 12.4.1., and 12.4.2. for armoured vehicles and hearses, insert new Point 1.0. in Annex 2 Section I, insert new para. 12.2.4. in the 08 Series, amend para. 9.3. in the 08 Series to change reference date from registration to production, amend para. 9.2.2. in the 09 Series to change reference date from registration to production and extend in-service conformity checking period to 200,000 km or 10 years, insert new definitions paras. 2.65. and 2.66. in the 09 Series, and amend Annex 12 para. 1.(e) in the 09 Series.

Proposal to amend Annex 5, para. 4.1.1. to distinguish between vehicles not utilising and utilising Over-the-Air data transmission of battery durability parameters, insert new paras. 4.1.3. to 4.1.3.2. for Over-the-Air transmission cases, amend para. 4.1.2. to reserve the certificate of compliance requirement, amend para. 4.2. regarding Part B verification by responsible authorities, insert new para. 4.2.1. for OBM data transmitted to authorities’ servers, amend para. 4.3. to establish pass/fail criteria where a battery durability family passes if equal to or more than 90 per cent of monitor values are above the MPRi or DPRi, and insert new para. 4.4. requiring corrective measures in case of a fail decision.

Proposal to amend Annex 5 para. 4 to introduce usage of Over-the-Air battery durability data transmitted by the On-Board Monitoring system for In-Service Conformity verification, insert new paras. 4.1.3. to 4.1.3.2., 4.2.1., and 4.4. to 4.6., and amend paras. 4.1.1., 4.1.2., 4.2., and 4.3. to specify verification procedures for vehicles with and without Over-the-Air data transmission, define statistically adequate sample requirements, establish pass/fail criteria based on monitor values, and introduce corrective measures in accordance with UN Global Technical Regulation No. 24.

Proposal to clarify applicable FCV test procedure, align run-in provisions with UN-R154, add SOC correction and modern hydrogen measurement provisions, correct inconsistencies, update hydrogen fuel specifications, and replace outdated UN GTR No. 15 reference in UN-R101 with UN-R154 for alternative road load determination.

Proposal to amend para. 3.7.1. to define rated engine power by reference to UN R85 or UN R177, modify para. 6.3.2.2. to specify applicability to Level 1A only (original and 02 series) or 4-phase WLTP test only (01 and 03 series), amend para. 6.3.2.3. to apply only to Level 1B (original and 02 series) or 3-phase WLTP test (01 and 03 series), modify Annex B1 para. 2.3.2. to except PEVs from Class 3 classification for Level 1B only (original and 02 series) or 3-phase WLTP test only (01 and 03 series), amend Annex B4 para. 6.2.1. and 6.2.4. regarding facility approval duration and validation, and modify Annex B8 para. 1.4., 3.4.1., and 4.1.2. to specify applicability to Level 1B or 3-phase WLTP test and adjust vehicle classification and testing requirements accordingly.

Proposal to amend Annex A1 points 3.2.12.2.10.2. to 3.2.12.2.10.5. to clarify that information on periodically regenerating systems is not applicable when a Declaration of Compliance for Regeneration Requirements is used, amend Annex A1 points 3.2.20.2.5. to 3.2.20.2.7.1. to clarify that information on heat storage and Ambient Temperature Correction Test is not applicable when a Declaration of Compliance for the ATCT is used, amend Annex A1 points 9.10.5., 9.10.5.5., 9.10.5.6. and 9.10.5.7. to limit applicability of heating system information to vehicles subject to Annex B10, and add explanatory notes (t), (u), and (v).

Proposal to amend para. 6.7.2.2. of Annex B4 to clarify the use of aerodynamic force values for body components and optional equipment, amend para. 3.2.3.2.2.3. of Annex B7 to update terminology from optional equipment to body components and/or optional equipment and to expand the alternative method to Level 1B, and amend para. 3.2.3.2.2.3.2.1. to require manufacturers to declare identifying information for simulation software and calculation conditions to be documented in test reports and agreed with the responsible authority.

Proposal to amend para. 6.2.4. of Annex B4 to separate force measurement accuracy verification from other measurements taken at three-monthly intervals, requiring force measurement accuracy to be verified upon initial installation, after major maintenance and within 370 days before testing, and to require that each combination of wind speeds used for road load determination be validated separately.

Proposal to amend para. A.1.3.2.1. to modify the PEMS consistency check of exhaust mass flow and gas concentrations for fuels with a molar carbon to hydrogen ratio of 0. For such fuels, the formula in para. 8.4.1.6. of Annex 4 shall be used instead, with Equations 30 and 31 applied for Type 1A dual-fuel hydrogen engines. The verification shall not apply to engines operated on non-carbon fuels or dual-fuel engines when operated in dual-fuel mode with at least one fuel having a molar carbon to hydrogen ratio of 0.

Proposal to:

• Insert a new para. 4 and 5 to the introduction of the 02 series and para. 5 and 6 to the introduction of the 03 series clarifying that the 03 series includes harmonised procedures and that amendments account for vehicles of categories X and Y equipped with Automated Driving Systems,
• Amend para. 2.1. to add ADS to general abbreviations,
• Amend para. 3.2.5., 3.2.31., 3.2.37., 3.5.8., 3.5.9., and 3.5.12. to include vehicle user terminology,
• Insert new para. 3.5.13. to 3.5.16. defining ADS road load determination mode, ADS testing mode, ADS user, and vehicle user,
• Amend para. 3.10.1., 3.10.4., and 3.10.20. concerning On-Board Diagnostic systems and malfunction indication to reference vehicle users and ADS,
• Insert footnote definitions referencing ECE/TRANS/WP.29/2026/153,
• Amend multiple paragraphs throughout Annexes A1, B4, B6, B8, C3, C4, and C5 to accommodate ADS operation,
• Insert new para. 4.2.1.8.6. to Annex B4 specifying ADS road load determination mode requirements for vehicles of categories X and Y,
• Insert new para. 2.4.2.7. to Annex B6 specifying ADS testing mode functional requirements,
• Amend various provisions concerning driver-selectable modes, reagent warning and inducement systems, and OBD monitoring to apply to vehicles equipped with ADS.

Proposal to expand the CFD alternative method to Level 1B and parts changed in minor model changes, with examples of applicable aerodynamic components that may change with MMC in the scope of the CFD alternative method.

Proposal to amend UN R49 to approve the use of hydrogen dual-fuel as a fuel in type approval of emissions for heavy-duty vehicles. The amendments introduce new requirements for measuring instruments such as FT-IR and QCL-IR, add symbols and specifications for hydrogen-fuelled engines specifying that only Type 1A hydrogen fuel is applicable, amend emission calculation formulas for ETC/ESC and WHDC test procedures, add new HO direct measurement methods for NOx wet correction calculation, and add declaration formats for FT-IR and QCL-IR approval.

Proposal to insert new definitions for ‘Instrument manufacturer’ and ‘Type of analyzer’, add symbols and abbreviations for hydrogen, water, ammonia, nitrogen dioxide, oxygen and particulates, add abbreviations for flame ionisation detector, Fourier transform infrared analyser, non-methane cutter and quantum cascade laser mid-infrared detection, amend provisions for hydrogen Type 1A dual fuel engines, modify fuel temperature requirements, insert procedures for water measurement using QCL-IR and FTIR analysers, add FTIR and QCL-IR analyser requirements and interference verification procedures, insert protocols and certificates for FTIR and QCL-IR analyser assessment, add fuel types including hydrogen, modify measurement procedures for dual-fuel hydrogen engines, and update related calculation methods and specifications throughout Annexes 4A, 4B and 11.

Proposal to amend para. 3.5.1. to include dual-fuel engines of Type 1A with hydrogen as gaseous fuel, amend para. 4.12.3.3.7. to establish a series of digits identifying dual-fuel engine types in the approval mark, insert new definitions for ‘Instrument manufacturer’ and ‘Type of analyzer’ in Annex 4 para. 3.1., insert new symbols and abbreviations in Annex 4 paras. 3.4. and 3.5., amend paras. 7.6.6., 7.7.4., and 8.1.1. to accommodate H₂O measurement and hydrogen engine calculations, amend para. 8.4.2.1., amend para. 8.6.2. to exclude CH₄ calculation when measured by FTIR or QCL-IR, amend para. 9.3.1.8. regarding gas drying, amend para. 9.3.2. to introduce FTIR and QCL-IR analyzers for CO, CO₂, CH₄, and NOx measurement with specifications in paras. 9.3.2.8. and 9.3.2.9., insert new para. 9.3.2.10. for independent analyzer assessment, amend para. 9.3.9. and para. 9.3.9.2.2. regarding interference effects and water quench checks, insert new paras. 9.3.9.5. and 9.3.9.6. for FTIR and QCL-IR interference checks, amend Annex 4 Appendix 2 para. A.2.1.2., amend Annex 4 Appendix 5 para. A.5.2., insert new Annex 4 Appendix 9 establishing procedure for H₂O measurement, insert new Annex 4 Appendix 10 for FTIR and QCL-IR analyzer assessment protocol, insert new Annex 4 Appendix 11 establishing model certificate for analyzer assessment, amend Annex 8 Appendix 1 paras. A.1.1., A.1.2.2., A.1.3.2.1., A.1.4.1., and A.1.4.3. for Type 1A hydrogen dual-fuel engines, amend Annex 15 paras. 4.2.2.3., 6.1., 10.3., and Appendix 4 paras. A.4.3.1., A.4.4.1.1., A.4.4.3.1., and A.4.4.3.3.

The document addresses accuracy calculation procedures in UN R154.04 Appendix 5, paragraph 4.2, which compares type-approval values from the mains with values at the vehicle interface for energy-related parameters of plug-in electric vehicles and other vehicles. It notes that losses of electric vehicle supply equipment and measurement uncertainties of external devices used to measure voltage and current are not considered in the accuracy calculation. OICA is developing a proposal to address both topics for submission to the 96th GRPE session.

Proposal to amend Annex 5, para. 5. to define Part C: Verification of reported assessment of virtual distance, amend para. 5.1. to specify the verification procedure including measurement of total discharge energy and approval by the responsible authority, insert new sub-paras. 5.1.1. through 5.1.5. to establish environmental temperature requirements, initial State of Charge setting, discharging test specifications, test termination conditions, and verification test procedures with Table 4 steps, and amend para. 5.2. to establish pass/fail criteria based on comparison of reported delta virtual distance to measured virtual distance with a 5 per cent threshold and statistical decision procedures using Table 5.

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.