18. The Chair of the IWG on Regulation No. 55 introduced ECE/TRANS/WP.29/GRRF/2015/14, partially addressing the mandate defined in the terms of reference to the group. He announced that further work would be necessary to deliver the remaining items expected. The Chair of GRRF agreed to inform WP.29 about the necessity to extend the mandate duration of the group. The proposal received some comments. The Chair of the IWG volunteered to prepare a revised proposal for the September 2015 session of GRRF.