Motor vehicles used on a private road are exempt from the requirement to be registered and licensed. — R19 (2) of Land Transport (Motor Vehicle Registration and Licensing) Regulations 2011
For the purposes of subclause (2), private road means a road, place, or arcade laid out or formed on private land by the owner of that land.
A forklift that is operated on the road, ie that is registered, requires a WoF. Therefore, the vehicle inspector may inspect a forklift only if it has a registration plate attached to it.
Note: A forklift used solely on a road that is a private road is not required to be registered (so no registration plate attached), and therefore a WoF cannot and must not be issued. Private road means a road, place or arcade laid out or formed on private land by the owner of that land. A forklift operated on a private road must still be safe and, if operated at night, must be fitted with headlamps or work lamps and rear position lamps. — VIRM In-Service Certification (WoF and CoF)