No, since the ECE-R44/04 standard only covers the ISOFIX anchorage system for Group 0-1. Group 2/3 child safety seats do not fall within this standard. The system, used by the CYBEX Group 2/3 seats, is referred to as ISOFIX-Connect and serves as additional anchorage for the car safety seat in the vehicle. The child is secured using the vehicle´s retractable 3-point safety belt.