10. GRSP resumed discussion on ECE/TRANS/WP.29/GRSP/2021/20, tabled by the expert from Spain, which provides updates of drawings of fixtures ISO/B2 and B3 (for assessing the external dimensions of an Enhanced Child Restraint System (ECRS)) for booster seats volumes to allow the possibility of a support leg. The expert from CLEPA provided more evidence from impact tests and simulations to justify the proposal (GRSP-72-36 and item 10, para. 28).

11. GRSP adopted ECE/TRANS/WP.29/GRSP/2021/20, amended by annex III to the session report. The secretariat was requested to submit the proposal as draft Supplement 4 to the 08 series of UN Regulation No. 16 (Safety-belts) for consideration and vote at the June 2023 sessions of WP.29 and AC.1.

12. GRSP resumed discussion on ECE/TRANS/WP.29/GRSP/2021/25 (UN Regulation No.16), tabled by the expert from CLEPA to improve the compatibility between the support leg volume and the fixtures to assess the volume of an ECRS. GRSP noted the justifications for this proposal in GRSP-72-36.

13. GRSP adopted ECE/TRANS/WP.29/GRSP/2021/25, not amended. The secretariat was requested to submit the proposal as part of (see paragraph 11 above) draft Supplement 4 to the 08 series of UN Regulation No. 16 (Safety-belts) for consideration and vote at the June 2023 sessions of WP.29 and AC.1.

14. GRSP agreed to defer discussion to its May 2023 session on ECE/TRANS/WP.29/GRSP/2022/3 (safety-belts of seat positions equipped with the lower ISOFIX anchorages) while waiting for the follow-up to a meeting (January or February 2023) of a group of interested parties that would be coordinated by the expert from Japan.

15. GRSP agreed to defer discussion to its May 2023 session on ECE/TRANS/WP.29/GRSP/2022/12, tabled by the expert from OICA on rearward-facing CRS in rear seats that were combined with a frontal airbag.

16. GRSP resumed discussion on a proposal (ECE/TRANS/WP.29/GRSP/2022/13) tabled by the expert from France on clarifying the assessment of the connection of the Safety-Belt Reminder (SBR) system in the case of removable seats. GRSP also noted a presentation (GRSP-72-23) to introduce a proposal for a new series of amendments (GRSP-72-22). The expert from France explained that the proposal would clarify the requirements for SBR systems on test procedure (first- and second-level warning), visual warning and requirements for SBR in the rear seat row(s).

17. GRSP agreed to resume discussion at its May 2023 session on a revised document combining GRSP-72-22 and ECE/TRANS/WP.29/GRSP/2022/13, as a new series of amendments. GRSP requested its experts to provide feedback on GRSP-72-22 and ECE/TRANS/WP.29/GRSP/2022/13 to the expert from France before the deadline for submission of official documents for the May 2023 session.

18. The expert from the Republic of Korea introduced a presentation (GRSP-72-13), that sought clarification on three issues with SBR: (a) exemption of the presence of SBR on folding seats, (b) first level of warning tests with transmission in neutral position, and (c) interference of devices for remote starting of vehicles with SBR. GRSP agreed to establish an ad hoc group led by the expert from Republic of Korea with participation by the experts from France, Germany, Japan, the Netherlands, Spain, CLEPA and OICA, on solving the three SBR issues.

19. GRSP discussed GRSP-72-39 under agenda item 24(b) (see paragraph 53).