55. The expert from EC introduced GRPE-77-12 on a clarification of definitions of peripheral devices. The expert from the United Kingdom further explained the proposal and required guidance from GRPE. GRPE requested the secretariat to distribute the document with an official symbol at the next session of GRPE in January 2019 and agreed that the Chair would request guidance from WP.29/AC.3 on modifications to Mutual Resolutions and if other working parties would like to provide an input to this proposal.