5. The secretariat introduced GRPE-70-10, announcing that the next GRPE session would take place on 9-12 June 2015 and recalling that the deadline for the submission of official documents would be 6 March 2015. These dates may be reconfirmed by the secretariat. The Chairs and Secretaries of informal working groups were invited to approach the secretariat to define the calendar of meetings of informal working groups for the June 2015 GRPE session.