New South Wales Consolidated Acts(cf model provisions, s 95)
(1) A person is guilty of an offence if:(a) a breach of a mass, dimension or load restraint requirement occurs, and(b) the person is the driver of the vehicle or combination concerned.Maximum penalty: see Table to Division.
(2) If the breach concerned is a minor risk breach, a person prosecuted for an offence under this section has the benefit of the reasonable steps defence for an offence under this section.
(3) If the breach concerned is a substantial risk breach or a severe risk breach of a mass requirement, a person prosecuted for an offence under this section has the benefit of the reasonable steps defence for an offence under this section.