11. As follow-up of the concerns raised during the December 2011 session of GRSP, the expert from EC introduced GRSP-51-10-Rev.1, jointly prepared by the experts from the Netherlands and OICA, amending the initial proposal. The proposal received further comments from the experts from South Korea, Japan and the United States of America. Accordingly, GRSP considered GRSP-51-33-Rev.2 (superseding GRSP-51-10 GRSP-51-10-Rev.1 and GRSP-51-33-Rev.1). However, some experts requested a study reservation of the proposal. GRSP requested the secretariat to distribute GRSP-51-33-Rev.2 with an official symbol at its December 2012 session. Finally, GRSP recommended experts to prepare an update of the final report of the amendment of the UN GTR (ECE/TRANS/WP.29/GRSP/2012/2), if needed and draft a similar proposal of amendments to the UN Regulation on pedestrian safety for the next session of GRSP.