Northern Territory Consolidated Regulations Northern Territory Consolidated Regulations(1) If a trailer has air brakes, its braking system must include at least 1 air storage tank.
(2) If a trailer has vacuum brakes, its braking system must include at least 1 vacuum storage tank.
(3) An air 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 rule 128; and
(b) be safeguarded by a check valve or other device against loss of air or vacuum if the supply fails or leaks.
(4) Subrules (1), (2) and (3) do not apply to a trailer with a GTM of 2 tonnes or less.