Buying a second-hand car: WoF

As I am looking at buying a second-hand car, I've been doing a bit of research about the options. One thing I didn't know, was what someone posted on Emigrate NZ:

No one is allowed to sell a car without a WOF which is less than one month old (exception being brand new cars that dont require wofs for a few years as they are brand new).

Usually that means the car you are buying has to have a new wof before you buy it.

It is possible to sell a car without a WOF, but only if it is sold "as is"

Doing a quick google for "second hand car wof site:govt.nz" gives me this link on the Land Transport NZ web site corroborating the claim.