Directional signals shall be of an approved type and inspected for functioning, mounting, color, and positioning. This includes motorcycles if equipped with signals. Motorcycles manufactured after January 1973 shall be equipped with turn signals. Do not certify if: The lamp is not an approved type; The lamp is not in an approved position (see Regulation .22, diagrams 1—6): The lamp is not functioning properly; The lamp is not properly directed; The lamp is not clearly visible; The lamp has a cracked or broken lens; The operating system is not of an approved type; The operating system is not functioning properly; A self-cancelling mechanism does not function properly; A 1962 or newer model is not equipped with approved turn signals.