(1)  If a light trailer has air brakes, its braking system must include at least one air storage tank.

(2)  If a light trailer has vacuum brakes, its braking system must include at least one vacuum storage tank.

(3)  An air storage system or vacuum storage system must –

(a) be built to give a visible or audible warning to the driver of the towing vehicle, while in a normal driving position, of a lack of air or vacuum that would prevent the brakes from meeting the performance standards of regulation 110 ; and

(b) be safeguarded by a check valve or other device against loss of air or vacuum if the supply fails or leaks.

(4)  This regulation does not apply to a light trailer with a GTM of 2 tonnes or less.