18. The expert from France introduced GRSP-61-13 which clarified the second level of warning to detect occupants on the rear seating positions. GRSP noted some disagreement on the proposed requirements and invited the experts from France, EC and OICA to cooperate. Finally, GRSP agreed to resume discussion at its December 2017 session and requested the secretariat to distribute GRSP-61-13 with an official symbol at that session.