146. The chair of the IWG on Phase 2 of gtr No. 7 on Head Restraints reminded AC.3 that ‎work to establish injury criteria, based on biomechanical data, had been inconclusive and that the group had been suspended for approximately 18 months. It appeared that new data would not be available before the end of 2017 and that it may be necessary to take a different approach.

147. AC3 agreed that this should be discussed at GRSP who would report back at the 50th session of AC3 in June. The mandate of the Informal Working Group was extended until June 2018.