4. The expert from the United Kingdom, Chair of the IWG on UN Global Technical Regulation (UN GTR) No. 7 Phase 2, informed GRSP about the work progress (GRSP-53-14) of his group. He added that the last meeting of the group had been held on 23-24 April 2013 in Paris and that two further WebEX meetings would be held before the summer to advance the drafting. He explained that as a result of its activities the group agreed on:

(a) An effective head restraint height measurement procedure whose thresholds for an absolute height would be returned to GRSP for final decision.

(b) An appropriate dynamic test, including the test procedure, injury criteria and the associated corridors for the Biofidelic Rear Impact Dummy (BioRID II).

5. The expert from the United Kingdom questioned if new tolerances for the three-dimensional H point machines (3-D “H”) should be specified and, if so, whether these should be specific to UN GTR No. 7 (and UN Regulation No. 17) or for all UN Regulations and UN GTRs where the machine is used. He welcomed suggestion on how to proceed for its establishment in the Mutual Resolution (M.R.1) accordingly. He announced that a draft UN GTR would be submitted officially for the December 2013 session of GRSP and introduced a first draft for information (GRSP-53-06). He concluded that the IWG expected to finalize complementary proposals to introduce the injury criteria in the UN GTR and the Biofidelic Rear Impact Dummy (BioRID II) as Addendum 1 to the M.R.1 in time for the next GRSP session. GRSP noted that a guideline proposal to insert tools into the M.R.1, based on the example of BioRID II, would be also circulated at the next session.

6. The expert from the Netherlands introduced rationales (GRSP-53-17) to justify the proposal (GRSP-53-15), for information only, to increase the height of head restraints up to 830 mm in at least one position of head restraint adjustment and not less than 720 mm in any position of head restraint adjustment. He also provided an overview on the measuring method for effective head restraint height (GRSP-53-16). The expert from OICA reminded GRSP that the new measurement procedure would reduce the measured height by 20 mm (therefore making the current limit, as it stands, more severe), and this should be taken into consideration for establishing new height thresholds. The expert from the United Kingdom encouraged cost benefit analysis to justify the proposed thresholds.

7. Finally, GRSP agreed to resume consideration of this agenda item on the basis of final proposals submitted by the IWG.