9. The expert from Spain introduced GRSP ECE/TRANS/WP.29/GRSP/2021/20 in a presentation (GRSP-70-03), updating drawings of fixtures of booster seats to allow the seats to be designed in combination with a support leg as anti-rotational systems. The proposal caused concern with GRSP experts for the effects on UN Regulation No. 145 (ISOFIX anchorage systems, ISOFIX top tether anchorages and i-Size) and real-world crashes. GRSP agreed to resume discussion on a revised version of ECE/TRANS/WP.29/GRSP/2021/20 (UN Regulation No. 16), at its May 2022 session with more evidence of the crash situation in real vehicles, in side impact and offset configuration.

10. The expert from CLEPA introduced ECE/TRANS/WP.29/GRSP/2021/25 in a presentation (GRSP-70-18), amending the existing support leg volume to improve the compatibility between the support leg volume and the Child Restraint Fixtures used for assessing the external dimensions of an Enhanced Child Restraint System. GRSP agreed to resume discussion on a revised version of ECE/TRANS/WP.29/GRSP/2021/25 (UN Regulation No.16), at its May 2022 session requesting more evidence in real crash.

11. The expert from Japan introduced ECE/TRANS/WP.29/GRSP/2021/19 on the safety-belts of seat positions equipped with the lower ISOFIX anchorages. He also introduced presentation GRSP-70-32 highlighting that the maximum values of pelvis acceleration and lap belt force of rear dummies were larger than those of front dummies. The expert from OICA introduced GRSP-70-25 showing that data from the expert of Japan showed that for booster seats secured by both safety-belt and ISOFIX could cause slack in the belt system which leads to increased dummy loadings. Therefore, he suggested that booster seats with ISOFIX attachments should be type approved according to UN Regulation No. 129 as “specific to vehicle” and not as “universal” or “i-Size”. GRSP agreed to resume discussion on the proposal at its May 2022 session.

12. GRSP resumed discussion on ECE/TRANS/WP.29/GRSP/2019/15, on frontal airbag in rear seats. The expert from EC informed GRSP that the present European Union legislation was incompatible with the presence of the above-mentioned airbags and that EU was in the process of updating it. However, he encouraged experts to seek a solution independent of this revision process. GRSP agreed to resume discussion on the basis of a possible revised proposal as announced by the expert from OICA, in order to limit the proposal to vehicle specific child restraint systems.

13. The expert from Finland introduced GRSP-70-06 and GRSP-70-07 justifying the introduction of three-points safety-belts on buses. The expert from the Netherlands supported the initiative. The expert from EC stated that he was open to consider the proposal but would like to see the initiative paired with safety belt reminders to ensure maximum benefit. The expert from Sweden supported the initiative from Finland. However, she asked for more about negative consequences, especially about occupant evacuation. The expert from OICA supported the need for accident data from other regions and review them carefully before drawing conclusions; he also noted that it would be useful to review the UN Regulation No. 80 requirements before deleting the possibility of two point-belts, which would have huge consequences. GRSP finally agreed to resume discussion on the proposal of the expert from Finland on the basis of broader data at its next sessions.