The primary role is to co-operate with all JAA-NAAs to establish common high standards of compliance with licensing related codes such that mutual recognition is justified. The role involves developing new and updating existing harmonised requirements, e.g. JAR-FCL 1 (Aeroplanes), JAR-FCL 2 (Helicopter), JAR-FCL 3 (Medical) and JAR-FCL 4 (Flight Engineers).