Additional lamps on breakdown vehicles
9.—(1)  One or more lamps showing an amber light may be carried on a breakdown vehicle.
(2)  Each lamp carried in pursuance of this rule shall be so fixed to the vehicle that the centre of the lamp is at a height of not less than 1½ metres from the ground and that it is on or as near as practicable to the longitudinal axis of the vehicle.
(3)  The light shown by each lamp carried in pursuance of this rule shall be in the form of a concentrated beam or beams rotating in a substantially horizontal plane.
(4)  No breakdown vehicle shall carry a lamp showing an amber light in pursuance of this rule except while it is being used in connection with, and is in the immediate vicinity of, an accident or breakdown, or while it is being used to draw a brokendown vehicle.