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.

37. The expert from Spain presented informal document GRSP-78-03-Rev.1 with the status report of the IWG on Safer Transport of Children in Buses and Coaches (IWG-STCBC). The group had achieved its objectives and concluded its work with the submission this session of a proposal (ECE/TRANS/WP.29/GRSP/2025/10) for phase 2 of UN Regulation No. 170 which would allow the use of Child Restraint Systems approved according to UN Regulations Nos. 129 or 44 in bus seats with 2-point belts. She proposed that a task force would continue work on a number of issues identified by IWG-STCBC and develop amendments to UN Regulations Nos. 16, 107 and 173. GRSP agreed with this approach.

38. The expert from Spain then presented the proposal in working document ECE/TRANS/WP.29/GRSP/2025/10. The expert from Italy suggested to modify a date in the transitional provisions and the expert from the Kingdom of the Netherlands suggested to specify a fixed revision of standard ISO 6487. The expert from Spain submitted a revised proposal (informal document GRSP-78-46) taking into account the feedback received and also aligning with the revised proposal to amend UN Regulation No. 129 regarding small shoulder heights (see paragraph 34 and informal document GRSP-78-47-Rev.1). GRSP thanked IWG-STCBC for successfully concluding the work they had been assigned and adopted informal document GRSP-78-46, as amended (as reproduced in annex VIII) and requested the secretariat to submit it as a proposal for a 01 series of amendments to UN Regulation No. 170 to the June 2026 sessions of WP.29 and AC.1.