21. The World Forum noted the revised programme of work and documentation (ECE/TRANS/WP.29/2013/1/Rev.1). WP.29 representatives were invited to review the document and to communicate to the secretariat any amendments deemed necessary. The secretariat presented the list of informal working groups of WP.29 and its subsidiary Working Parties (GRs) (WP.29-160-01). WP.29 agreed to fix 31 December 2015 as the expiry date of the groups not having an agreed upon date. The secretariat presented the draft calendar of sessions for the year 2014 (WP.29-160-02). The World Forum agreed with the proposal to modify the autumn session of GRSG (30 September–3 October 2014). It was noted that the proposed calendar should be confirmed by UNOG Conference Services.