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National Transport Commission (Road Transport Legislation – Vehicle Standards) Regulations 2006
142Air supply for brakes in B‑doubles and road trains
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142 Air supply for brakes in B‑doubles and road trains
A B‑double or road train that uses compressed air to operate accessories must have: (a) sufficient air compressor capacity and air receiver volume to ensure that the operation of the accessories does not adversely affect brake performance; and (b) a compressed air system built to ensure that the brake system is preferentially charged.