National Transport Commission (Road Transport Legislation – Vehicle Standards) Regulations 2006
133Operation of brakes on trailers
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133 Operation of brakes on trailers
(1) The braking system of a trailer with a GTM over 2 tonnes must allow the driver of a motor vehicle towing the trailer to operate the brakes from a normal driving position. (2) However, subrule (1) does not apply to an unloaded converter dolly that weighs under 3 tonnes if the motor vehicle towing the converter dolly has a GVM over 12 tonnes. (3) The brakes on a trailer with a GTM over 2 tonnes must: (a) operate automatically and quickly if the trailer breaks away from the towing vehicle; and (b) remain in operation for at least 15 minutes after a break‑away; and (c) be able to hold the trailer on a 12% grade while in operation after a break‑away.