(Regulations 18 and 20)

SCHEDULE 8requirements relating to obligatory and optional hazard warning signal devices

Every hazard warning signal device shall–

(a) be operated by one switch;

(b) cause all the direction indicators with which a vehicle or a combination of vehicles is equipped to flash in phase;

(c) be provided with a circuit-closed tell-tale in the form of a flashing light which may operate in conjunction with any direction indicator tell-tale; and

(d) be able to function even if the device which controls the starting and stopping of the engine is in a position which makes it impossible to start the engine.