Which statement concerning child restraint systems is incorrect?

• 1Children must be in child restraint systems in a fastened position.
• 2Child restraint systems are installed on seating positions, except for the first row.
• 3When transporting a child under three years of age in a passenger car in a first-row seat, the installation of child restraint systems that are installed against the direction of travel without deactivating the frontal airbag of that seat is permitted.