20. The expert from Spain on behalf of the Technical Services Group (TSG) on UN Regulation No. 129 introduced ECE/TRANS/WP.29/GRSP/2021/7 as amended by GRSP-70-05, aimed at clarifying the head containment assessment for side impact testing. GRSP adopted ECE/TRANS/WP.29/GRSP/2021/7 as amended by annex VI (GRSP-70-05) to the report. The secretariat was requested to submit the proposal as draft Supplement 7 to the 03 series of amendment to UN Regulation No. 129 for consideration and vote at the June 2022 sessions of WP.29 and to AC.1.

21. Referring to the decision taken under agenda item 6 (see paragraph 10 above) on a parallel proposal submitted by the expert from CLEPA, GRSP agreed to resume discussion on a revised version of ECE/TRANS/WP.29/GRSP/2021/26, on the extension of the support-leg, at its May 2022 session and requested more evidence of real crash data.

22. The expert from CLEPA introduced presentation GRSP-70-22 to explain the effect of chin-to-chest contact of dummies during type approval testing and potential solutions. GRSP endorsed in principle, as a pragmatic solution, the proposal from the expert from CLEPA that introduced the neck tension force limits based on measured type-approval monitoring data as proposed in GRSP-68-05. GRSP requested to continue sharing information at its May 2022 session on this subject awaiting an official proposal from the expert from CLEPA based on GRSP-68-05.