(1) This section applies to a heavy vehicle, other than a police vehicle, that under the heavy vehicle standards may be fitted with a blue light.
(2) The heavy vehicle standards are taken to further provide that the heavy vehicle may be fitted with a blue light only if the commissioner has given written permission for the fitting of the light.
(3) A written permission for the fitting with a blue light of a heavy vehicle to which this section applies, given by the commissioner before the commencement of this section and still in force immediately before the commencement, is taken to be a written permission for the fitting of the light given under subsection (2) .
(4) This section applies in relation to a blue light whether or not it is a light that flashes.
(5) In this section—
"police vehicle" means a heavy vehicle driven by a police officer in the course of the police officer’s duty.