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.

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.