17. The co-Chair of the informal working group reminded WP.29 that WP.29-157-06, dealing with design/control principles of Advanced Driver Assistance Systems to harmonize minimum guidelines was referred to the subsidiary bodies for detailed consideration. The World Forum noted that no meeting of the informal working group on ITS was scheduled for this session. Upon the request of the Chair of GRSG, the World Forum agreed to postpone the final review of the revised document to its June 2013 session.