The Informal Working Group on EV/HFCV Retrofit Systems held its seventh meeting on 5th March 2026. The group adopted the provisional agenda, approved minutes of the previous meeting, and acknowledged ongoing activities under GRPE, GRSP and GRVA. Electrical safety review will continue once clarification regarding UN R100 is available. Cybersecurity discussions covered very old vehicles, older vehicles without cybersecurity provisions, and modern vehicles compliant with UN R155. Braking aspects and the structure of the draft UN Regulation were discussed, including vehicle versus system approval approaches and minimum and maximum vehicle age within the regulation’s scope.

Proposal to correct inconsistencies in isolation resistance monitoring system requirements for vehicles of category O₃ and O₄ trailers to provide optical and/or audible warnings via CAN-Bus signal transmission. High voltage REESS isolation resistance requirement set at minimum 100 Ω/Volt or protection degree IPXXB fulfillment. Requirements do not apply to REESS solely installed on vehicles of category O or batteries used for recuperation.

Proposal to account for vehicles of categories X and Y, extend application to vehicles without driver and without manual driving controls, and address inconsistencies related to REESS provisions. The amendment introduces ADS feature types 1 and 2, modifies warning transmission requirements for ADSF-2, adjusts isolation resistance specifications, and exempts certain REESS requirements for category O and Y vehicles. Changes include updates to Annex 8 stopping conditions and Annex 9E terminology.

Proposal to amend UN R100 Supplement 1 to the 05 series. The Regulation is amended to account for vehicles of category X and Y, and to extend application to vehicles without driver and without manual driving controls. For vehicles equipped with an Automated Driving System, provisions apply based on driving mode. New definitions for ADS feature of type 1 and type 2 are inserted. Modifications address isolation resistance monitoring, REESS warnings, and test procedures in Annexes 8 and 9E. Thermal propagation requirements do not apply to vehicles of category Y.

Proposal to correct inconsistencies following the amendment of regulation 100 by vehicles of category O

Proposal to amend UN R100 to account for vehicles of categories X and Y equipped with an Automated Driving System. The Regulation, originally drafted for vehicles with driver and manual driving controls, is extended to vehicles without driver and without manual driving controls. Modifications include new definitions for ADS feature types, amended provisions for active driving possible mode, warning requirements for REESS failures and low energy content when ADSF-2 is active, and adjusted test procedures in Annexes 8 and 9E.

Proposal to correct inconsistencies pursuant to the introduction of provisions for trailers (Category O vehicles) into the regulation.

Proposal to correct inconsistencies pursuant to the introduction of provisions for trailers (Category O vehicles) into the regulation.

Approved during the 29th EVS session.

Proposal to align paragraphs 5.1.4.3 ; 5.2.3 ; 6.8 and Annex 1 –Appendix 2 ; Annex 9 – Appendix 1 ; Annex 9B ; Annex 9E and Annex 9H in the French translation of UN R100 to ensure its conformity with the English text.

Proposal to align paragraphs 5.1.4.3 ; 5.2.3 ; 6.8 and Annex 1 –Appendix 2 ; Annex 9 – Appendix 1 ; Annex 9B ; Annex 9E and Annex 9H in the French translation of UN R100 to ensure its conformity with the English text.

Proposal to align paragraphs 5.1.4.3 ; 5.2.3 ; 6.8 and Annex 1 –Appendix 2 ; Annex 9 – Appendix 1 ; Annex 9B ; Annex 9E and Annex 9H in the French translation of UN R100 to ensure its conformity with the English text.

Proposal to correct inconsistencies following the amendment for vehicles of category O

Proposal to correct inconsistencies following the amendment for vehicles of category O

Proposal also for a corrigendum 1 to the 04 series of amendments and a
corrigendum 1 to the 5 series of amendments

Proposal from the GRSP AVSR task force to enable application of UN R100 to ADS vehicles.

Proposal to enable the application of UN R100 to certain vehicles equipped with an Automated Driving System.

Proposal to introduce

• The term and definition of “common space”, and
• Provisions for ensuring the confidentiality of intellectual property

Proposal to introduce

• The term and definition of “common space”, and
• Provisions for ensuring the confidentiality of intellectual property

Proposal to introduce new requirements concerning risks of thermal propagation for the approval of electric-powered vehicles.

Update proposal to introduce new requirements concerning risks of thermal propagation for the approval of electric-powered vehicles, superseding the contents of document GRSP/2024/18.

Proposal to standardize the translation of “Rechargeable Electrical Energy Storage System” (REESS) into Russian.

Proposal from the Special Interest Group on Thermal Propagation, superseding the contents of documents GRSP/2024/22, to introduce the term and definition of “common space”, provisions for ensuring the confidentiality of intellectual property, and to note exemptions for existing approvals with regard to the provision “to allow egress” in the approval Communication form.

Draft proposal to introduce provisions for thermal propagation testing intended to supersede the formal proposal GRSP/2024/18 during the December GRSP session, and to make editorial corrections to previous supplements.

Proposal by Australia, France, Germany, Italy, Japan, Republic of Korea, the Netherlands, Spain, the United Kingdom, and the European Commission to revise requirements on thermal propagation and the approval of electric powered vehicles.

Proposal from Australia, France, Germany, Italy, Japan, Republic of Korea, the Netherlands, Spain, the United Kingdom and the European Commission to introduce the term and definition of “common space”, provisions for ensuring the confidentiality of intellectual property, and to note exemptions for existing approvals with regard to the provision “to allow egress” in the approval Communication form.

Proposal to introduce provisions for trailers (category O) with electric power trains.

Proposal to introduce provisions for trailers (category O) with electric power trains.

Proposal to introduce provisions for trailers (category O) with electric power trains.

Explanation of draft proposals to introduce thermal propagation testing provisions and status of the EV Thermal Propagation interest group activities.

Proposal to enable the use and identification of the thermal propagation testing used in the approval of a vehicle and to ensure correct handling of manufacturer intellectual property.

Proposal from the Thermal Propagation special interest group to introduce provisions for testing thermal propagation risks, identification of test method(s) used, and for protection of the manufacturer’s intellectual property.

Proposal to introduce provisions for identification of buses and trucks equipped with an electric drivetrain consistent with existing regulated identification for Liquified Petroleum Gas (LPG), Compressed Natural Gas (CNG), Liquid Natural Gas (LNG) and Compressed Hydrogen (H2) fueled trucks and buses.

Proposal to introduce provisions for thermal propagation testing and handling of confidential business information.

Working draft proposal to introduce provisions for thermal propagation testing and handling of confidential business information.

Draft Terms of Reference for an Ad-hoc Special Interest Group on model regulation regarding the safety of electric vehicles with a focus on thermal propagation requirements. The purpose is to set up a special interest group (SIG TP) that will deliver a draft regulatory text proposal for a model regulation regarding the safety of electric vehicles with a focus on a thermal propagation test method. This proposal is intended to serve as the basis of relevant UN and national regulations with widely harmonized technical provisions and will be used for a proposal of a new series of amendments to UN Regulation No.100.

Proposal to enable identification of buses and trucks equipped with an electric drivetrain.

Proposal to clarify the direction of impact in the mechanical integrity test.

Proposal to clarify the direction of impact in the mechanical integrity test.

Proposal to introduce provisions for identification of buses and trucks equipped with an electric drivetrain consistent with existing regulated identification for Liquified Petroleum Gas (LPG), Compressed Natural Gas (CNG), Liquid Natural Gas (LNG) and Compressed Hydrogen (H2) fueled trucks and buses.

Proposal to introduce provisions for identification of buses and trucks equipped with an electric drivetrain in a manner consistent with existing regulated identification for Liquified Petroleum Gas (LPG), Compressed Natural Gas (CNG), Liquid Natural Gas (LNG) and Compressed Hydrogen (H2) fueled trucks and buses.

Proposal for a correction (corrigendum) to the French-language version of the 03 series of amendments.

Proposal to clarify the direction of impact in the mechanical integrity test.

Proposal to clarify the direction of impact in the mechanical integrity test.

To align the French translation with the English text on Thermal propagation.

Proposal to clarify the meaning of the word “or” in paragraph 6.15.1.13 of the 03 series of amendments

Proposal to that information about electric safety on a label may not be necessary if the proposed requirement in UN 134 have been met

The proposal aimed to an identification of buses and trucks equipped with an electric drivetrain which is consistent with existing regulated identification for Liquified Petroleum Gas (LPG), Compressed Natural Gas (CNG), Liquid Natural Gas (LNG) and Compressed Hydrogen (H2) fuelled trucks and buses.