131. The representative of Japan gave a status report of the work of the IWG. He reported that IWG had met on two occasions and had held one WebEx meeting to discuss primary injury criteria. He noted that the Group was waiting for output from Post Mortem Human Subjects (PMHS) studies conducted by NHTSA. He added that this work would help establish pass/fail criteria. He added that the study performed by NHTSA had provided good data on the reproducibility and repeatability of the Bio Rear Impact Dummy (BioRID), but it has not been possible to determine the correlation between the dummy and PMHS. Work would therefore, be needed to establish statistical significance. He also informed AC.3 that the IWG was pursuing a more empirical approach to determine biomechanical criteria and that alternative approaches were under study. He reported that the IWG has transmitted an updated draft amendment to the UN GTR to GRSP for discussion at its December 2015 session and that the details of the proposal would be refined during a WebEx meeting before December 2015. He added that he expected a final proposal in May 2016 on UN GTR No. 7 and M.R.1 and that these would be brought to WP.29 in November 2016.