4. The expert from Germany, on behalf of the Chair of the Informal Working Group (IWG) on the UN Global Technical Regulation (UN GTR) No. 7 – Phase 2, informed GRSP about the work progress of the IWG (GRSP-56-04). He clarified that the IWG had defined a short list of candidate injury criteria to be used in the test of the UN GTR Phase 2. He added that the test pulse had been defined and that good repeatability and reproducibility of the biomechanical rear impact dummy (bioRID) had been achieved. He concluded that a full set of drawings and specifications of the dummy would be incorporated in the draft Addendum 1 of the Mutual Resolution No. 1 (M.R.1), along with the draft amendment to the UN GTR by the December 2015 session of GRSP. The expert from Japan added the presentation of the expert from Germany by introducing the status report of the IWG (GRSP-56-05).

5. Concerning the height of head restraints, the expert from the Netherlands reminded GRSP that a proposal with new thresholds had been submitted last year (ECE/TRANS/WP.29/GRSP/2013/17) and that the new measurement method agreed by the IWG was guaranteeing good repeatability. The expert from OICA argued that the new test method by itself was reducing the measured height of the head restraints by about 30 mm and that the additional severity due to the new thresholds referenced in ECE/TRANS/WP.29/GRSP/2013/17 needed further justification. The expert from India was of the opinion that an anthropometry study should be carried out to investigate the consequences of increased height of head restraints.

6. Finally, GRSP agreed to resume discussion on this agenda subject at its May 2015 session on the basis of the outcome of work of the IWG.