To clarify / quote the rules:
The definition of class MA is:
A passenger vehicle (other than a Class MB or Class MC vehicle) that has not more than nine seating positions (including the driver's seating position).
Some of the high stop light rules (part of rule 32005) are:
A motor vehicle of Class MA, first registered in New Zealand on or after 1 January 1990, must be fitted with one or two high-mounted stop lamps.
A vehicle retrofitted with a high-mounted stop lamp must comply with 5.3. (stuff about light specs, visibility etc etc)
The definition of a class MC vehicle is (most ORE members):
A passenger vehicle, designed with special features for off-road operation, that has not more than nine seating positions (including the driver's seating position), and that:
has four-wheel drive; and
has at least four of the following characteristics when the vehicle is unladen on a level surface and the front wheels are parallel to the vehicle's longitudinal centre-line and the tyres are inflated to the vehicle manufacturer's recommended pressure:
an approach angle of not less than 28 degrees;
a breakover angle of not less than 14 degrees;
a departure angle of not less than 20 degrees;
a running clearance of not less than 200 mm;
a front-axle clearance, rear-axle clearance, or suspension clearance of not less than 175 mm.
End result for most ORE members vehicles is that high stop lights are optional, but must meet the rules if fitted.
