Proposal to establish uniform provisions concerning the approval of M₂ and M₃ vehicles to assist in the prevention of children being left inside.

This regulation applies to Special Purpose Vehicles of Categories M₂ and M₃, class B and III designed specifically for the carriage of children. Vehicles shall be equipped with a physical inspection system engaged when the vehicle master control switch is turned off and disarmed via an inspection confirmation device located behind the rearmost passenger seat. An external visual and audible warning must be generated within 3 minutes for buses not exceeding 22 passenger seats, or within 5 minutes for buses exceeding 22 passenger seats, if the system is not disarmed. The visual warning shall remain on for at least 15 seconds, then remain off for no greater than 30 seconds, repeating in cycles lasting no less than 10 minutes. The audible warning shall be greater than 60 dB(A) with the same cycle requirements. Conformity of production procedures shall comply with Schedule 1 E/ECE/TRANS/505/Rev.3, with suitable controls checking dimensions and quality procedures.

The UN IWG for Children Left in Vehicles is in Phase 2 developing a new UN Regulation for vehicle categories M₂ and M₃. The draft UN Regulation includes requirements for visual and audible external warnings in buses and coaches to prevent children being left inside. The external warning shall be visual and audible, with the visual warning remaining on for at least 15 seconds then off for no greater than 30 seconds, repeating in cycles lasting no less than 10 minutes, using type approved direction indicator lamps all flashing with the same frequency. The audible warning shall remain on for at least 15 seconds then off for no greater than 30 seconds, repeating in cycles lasting no less than 10 minutes, and shall be greater than 60dB(A). Both warnings shall stop immediately after the physical inspection system is disarmed or the vehicle master control switch is turned on. The IWG intends to permit audible devices approved to UN Regulation No. 28 or UN Regulation No. 165 to generate the external audible warning.

Proposal to amend Annex 3 and Annex 7 regarding ASEP calculations and temperature corrections:

• Add reference to nMAX and kp factor for ASEP anchor point calculation in Annex 3, Appendix 1 Table 1,
• Clarify temperature correction equations and coefficients K1 and K2 by defining them uniquely in para. 3.2.3. and adding missing index j references in Annex 3, Appendix 2 paras. 3.2.3., 3.2.4., 3.3.3. and 3.3.4.,
• Delete from Annex 7 para. 5.2. a sentence regarding gear ratios for ASEP Lref that was wrongly introduced in Supplement 10 (GRBP-79-33/Rev.1).

The Children Left in Vehicles Informal Working Group holds its 19th session on 23 July 2026 from 17:00 to 19:00 Australian Eastern Standard Time online. The agenda includes feedback on drafting a UNR for light vehicles and consideration of a September face-to-face meeting in Paris.

Proposal to establish uniform provisions for approval of electric powertrain retrofit system installation on vehicles of categories M₁–M₃ and N₁–N₃:

• Add abbreviations section,
• Insert definitions of electric powertrain retrofit system, vehicle installation approval, approval of electric powertrain retrofit system, type of electric powertrain retrofit system, original vehicle, parent vehicle, and member of family,
• Modify scope to apply to electric powertrain retrofit systems and their installation on vehicles transformed,
• Delete prior scope provisions,
• Renumber paragraphs accordingly,
• Insert markings requirements for retrofit system installation plates,
• Add approval procedures and communication forms,
• Insert specific requirements regarding electric powertrain retrofit systems with compliance to applicable UN Regulations including UN R10, UN R13, UN R13H, UN R85, and UN R100,
• Insert application range provisions,
• Modify installer authorization requirements,
• Insert information requirements for retrofit system manufacturers to provide installers,
• Insert end-user manual requirements,
• Add provisions for periodic technical inspection including retrofit system identifiability and certification requirements,
• Insert conformity of production procedures,
• Modify procedures for extension and modification of approval,
• Modify penalties for non-conformity and withdrawal procedures,
• Insert introductory provisions explaining the Regulation’s purpose,
• Insert names and addresses reporting requirements for technical services and type approval authorities,
• Split Annexes 1, 2, 3, 4, 5, 6, and 7 into separate provisions for electric vehicles and hydrogen fuel cell vehicles,
• Insert Annex 5 specific requirements aligned with UNECE Regulations including electromagnetic compatibility, braking, electric drive train power measurement, rechargeable energy storage system compliance with phased timeline from date of entry into force to 1 September 2031 for UNECE Regulation 100 compliance, and other applicable regulations.

Proposal to amend para. 2.9. to define ISOFIX position as a position that satisfies the requirements of this Regulation to allow the installation of ISOFIX child restraint systems as defined in UN Regulation No. 44 and UN Regulation No. 129, amend para. 2.24. to define i-Size seating position as a seating position that satisfies the requirements defined in this Regulation to allow the installation of i-Size child restraint systems as defined in UN Regulation No. 129, amend para. 5.2.2.7. to exclude i-Size seating positions and low ISOFIX anchorages installed in vehicles of category M₂ or M₃ from the requirements of para. 5.2.2.6., amend para. 5.2.4.1. to provide that marking requirements do not apply to vehicles of category M₂ and M₃, and amend para. 6.2.5.1. to provide that for vehicles in categories M₂ and N₂ the force shall be 10 times the mass of relevant parts of the seat and for categories M₃ and N₃ it shall be 6.6 times the mass of relevant parts of the seat.