Bernie explained the truck was solely used to tow a private fifth wheeler. That it had a permanent hitch on the back, making it impossible to transport anything else. Apparently that makes no difference. We were told because the truck was over a certain gross laden weight ( 6000kg) the driver needed a 'Transport Service' licence. So the COF had been cancelled until Bernie applies for one.
How annoying! Not only will it cost $449 to get this licence, but no-one told us. NZ Transport never contacted us to say they had canceled our COF. Grrrr.
Just goes to show ... you're never too old to learn something new!