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National Transport Commission (Road Transport Legislation – Vehicle Standards) Regulations 2006
163Mounting of fifth wheel couplings on B‑doubles and road trains
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163 Mounting of fifth wheel couplings on B‑doubles and road trains
A fifth wheel coupling must be mounted on a prime mover, or a semi‑trailer used in a B‑double or road train, in accordance with Australian Standard AS 1771–1987, Installation of Fifth Wheel and Turntable Assemblies.