31. As per paragraphs 4 and 5, the experts from Austria and the Republic of Korea, on behalf of IWG, introduced ECE/TRANS/WP.29/GRSP/2023/33 and GRSP-74-23-Rev.1 amending it, to introduce a proposal of addendum to Mutual Resolution No.1 (M.R.1) submitted by the IWG to calculate Head Impact Time and concerning provisions for: (a) DPPS Generic Vehicle Models and (b) developing Human Body Model qualification corridors. GRSP adopted ECE/TRANS/WP.29/GRSP/2023/33, as amended by annex VIII of the session report and requested the secretariat to submit it as draft Amendment 4 to M.R.1 for consideration and vote at the June 2024 sessions of WP.29 and AC.3.

32. The expert from the Netherlands introduced ECE/TRANS/WP.29/GRSP/2023/37 and GRSP-74-09-Rev.1 amending it, to propose a new addendum to the M.R.1 to reproduce specifications of the three-dimensional H point machine. However, GRSP agreed to defer the adoption of the proposal to its May 2024 session to allow adoption at the same time of amendments to relevant UN Regulations and UN GTRs together those in the remit of the Working Party on General Safety Provisions and submit all proposals to the November 2024 sessions of WP.29 and AC.3.

33. The expert from Germany on behalf of the Task Force for the implementation of Q UN-Dummies into M.R.1 (TF-QUN) introduced the status report (GRSP-74-39) of the group. GRSP noted good progress in the work of the TF-QUN and agreed to resume consideration on this subject at its May 2024 session.