17. Recalling the purpose of ECE/TRANS/WP.29/GRSG/2011/23, the expert from CLEPA introduced ECE/TRANS/WP.29/GRSG/2012/4 and GRSG-102-04 improving the provisions on camera-monitor systems. GRSG noted a number of concerns on the approval marking. The expert from the EC underlined the importance of replacing all mirrors by camera-monitor systems. He volunteered to prepare for the next GRSG session a presentation on the impact of such systems on road safety. The expert from Germany reported (GRSG-102-31) on the work progress made by the ISO working group on the standardization of camera monitoring systems (ISO 16505). The expert from the Netherlands volunteered to prepare for the next session of GRSG a revised proposal taking into account the comments received and the outcome of the ISO working group.