14. The expert from the United States of America introduced draft UN GTR on safety of hydrogen and fuel cell vehicles (ECE/TRANS/WP.29/GRSP/2011/33) prepared by the special group safety (SGS). The proposal received some comments such as a better defining of the scope. GRSP noted that more time was needed by the SGS group to gather comments and finalize the proposal. Accordingly, GRSP agreed to seek consent for a six months extension of the mandate of the informal working group at the March 2012 sessions of WP.29 and AC.3, expecting the submission of a revised proposal for final review at the May 2012 session of GRSP. Experts were invited to provide comments on the proposal (GRSP-50-19-Rev.1 superseding ECE/TRANS/WP.29/GRSP/2011/33) to the expert of the United States of America, before the deadline for submission of official documents to the May 2012 session of GRSP.

15. Finally, the Chair of GRSP recalled the recommendation made during the December 2010 session of GRSP (see ECE/TRANS/WP.29/GRSP/48, para. 37) to all the Chairs of the informal working groups to ensure traceability of expert mandates for their participation in the meetings.