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National Transport Commission (Road Transport Legislation – Vehicle Standards) Regulations 2006
147Visible exhaust emissions—vehicles with internal combustion engines
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147 Visible exhaust emissions—vehicles with internal combustion engines
(1) This rule applies to a motor vehicle that is propelled by an internal combustion engine and was built after 1930. (2) The vehicle must not emit visible emissions for a continuous period of at least 10 seconds. (3) However, this rule does not apply to emissions that are visible only because of heat or the condensation of water vapour.