Western Australian Current Regulations Western Australian Current Regulations (1) If a motor vehicle
has air brakes, the braking system of the vehicle must include at least one
air storage tank.
(2) If a motor vehicle
has vacuum brakes, the braking system of the vehicle must include at least one
vacuum storage tank.
(3) An air or vacuum
storage tank must be built so the service brake can be applied to meet the
performance standards of regulation 335 at least twice if the engine of
the vehicle stops or the source of air or vacuum fails.
(4) An air or vacuum
storage system must —
(a) be
built to give a visible or audible warning to the driver, while in a normal
driving position, of a lack of air or vacuum that would prevent the service
brake from being applied to meet the performance standards of
regulation 335 at least twice; and
(b) be
safeguarded by a check valve or other device against loss of air or vacuum if
the supply fails or leaks.
(5) However,
subregulation (4)(a) does not apply to a light vehicle that is fitted
with an air or vacuum assisted braking system.
(6) If air brakes or
vacuum brakes are fitted to a motor vehicle equipped to tow a trailer, the
brakes of the vehicle must be able to stop the vehicle, at the performance
standards for emergency brakes under regulation 335 if the trailer breaks
away.
(7) The braking system
of a heavy vehicle equipped to tow a trailer fitted with air brakes must
include protection against loss of supply line air or brake control signal
air.
(8) The protection
mentioned in subregulation (7) must —
(a)
operate automatically if a brake supply line hose connecting the motor vehicle
and a trailer fails; and
(b)
maintain enough air pressure to allow the brakes to be applied to meet
performance standards for emergency brakes under regulation 335; and
(c)
include a visible or audible warning to the driver.