21. The expert from Germany introduced ECE/TRANS/WP.29/GRE/2011/29 through a presentation (GRE-65-31). GRE considered GRE-65-23-Rev.1, superseding ECE/TRANS/WP.29/GRE/2011/29. The expert from OICA also introduced GRE-65-24-Rev.1 and GRE-65-25 complementing ECE/TRANS/WP.29/GRE/2011/30. GRE agreed in principle with GRE-65-23-Rev.1 and requested the secretariat to distribute it with an official symbol at its October 2011 session. GRE also agreed to resume discussion on GRE-65-24-Rev.1 and GRE-65-25 on the basis of revised proposals voluntarily prepared by the expert from OICA.