GRSP-78-47/Rev.1
UN R129: Proposal for the 05 series of amendments

Proposal to amend UN R129 concerning Enhanced Child Restraint Systems. Modifications include: adjusting shoulder height dimensions in Annex 18 table 1 to align with anthropometric data for children from 40-70 cm; permitting one additional insert layer for infants below 50 cm; establishing minimum stature of 35 cm; and adding transitional provisions regarding type-approval acceptance timelines from September 2028-2029. Changes address fit concerns for premature newborns and small children.

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Excerpts from session reports
GRSP | Session 78 | 1-4 Dec 2025

34. The expert from the Netherlands introduced informal document GRSP-78-47-Rev.1 amending ECE/TRANS/WP.29/GRSP/2025/32 to improve the shoulder height requirements to properly take into account the dimensions of premature newborns. On a question from the expert from CI about practical implementation details, the expert from the Kingdom of the Netherlands replied that this matter was expected to be discussed by the same group of experts which would be discussing child restraint systems using electronic components (see paragraph above). GRSP adopted informal document GRSP-78-47-Rev.1, as amended, (as reproduced in annex VI) and requested the secretariat to submit it as a proposal for the 05 series of amendments to UN Regulation No. 129 to the June 2026 sessions of WP.29 and AC.1.