GRSP-79-03
UN R145: Proposal for a Supplement 3 to the 01 series of amendments
Source(s)
STCBC
Date
22 May 2026
Status
Informal GR review
Subject
Impact
01 series of amendments | Supplement 3
Meeting(s)

Proposal to amend para. 2.9. to define “ISOFIX position” as one that satisfies requirements of this Regulation to allow installation of ISOFIX child restraint systems as defined in UN R44 and UN R129, amend para. 2.24. to define “i-Size seating position” as one that satisfies requirements of this Regulation to allow installation of i-Size child restraint systems as defined in UN Regulation No. 129, amend para. 5.2.2.7. to exclude low ISOFIX anchorages installed in vehicles of category M₂ or M₃ from certain requirements, amend para. 5.2.4.1. to exclude vehicles of category M₂ and M₃ from marking requirements, and amend para. 6.2.5.1. to establish differentiated seat inertia forces for vehicles of categories M₂, N₂, M₃, and N₃. The justification clarifies that the definitions are based on tests fulfilled in this Regulation regarding strength rather than CRS category, addresses that the prior ISOFIX position definition incorrectly allowed i-Size CRS installation in non-i-Size positions, and harmonizes inertia loads for M₂ and M₃ vehicles with UN R14.

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Excerpts from session reports
GRSP | Session 79 | 1-5 Jun

29. The expert from Spain recalled the objectives of the task force on Safer Transport of Children in Buses and Coaches (TF-STCBC), which had been set in the previous GRSP session (see also informal document GRSP-78-03-Rev.1). She presented first drafts of proposals for amendments to UN Regulations Nos. 145 and 173 (informal documents GRSP-79-03 and GRSP-79-04, respectively), for feedback from GRSP.

30. On the amendments to UN Regulation No. 145, answering a question from the expert of Korea, she explained that in their view there was no need to exclude N2 and N3 vehicles from the scope, even if the use of child restraint systems in these types of vehicles was not common. The expert from the Kingdom of the Netherlands suggested removing the airbag from the pictogram.

31. On the amendments to UN Regulation No. 173, GRSP discussed the convenience of using a gabarit (child restraint fixture) to determine the minimum effective seat-belt length instead of the proposed new procedure.

32. The expert from Spain requested all experts to send her written feedback so that the TF would be in a position to submit working documents for adoption to the next session of GRSP.

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