How about a bit more info about your Corrado? It doesn't look stock-standard.... 
Ok ignore me, just seen your other post...
Thats ok mate it isnt really standard is it

Looks like ill be ok at the minute..........but as you say they keep changing the rules

Ownership flowchart
This flowchart applies to passenger cars (Class MA vehicles) imported from Europe. Either:
the car is over 20 years old, or
you have proof that the car complies with the required standards.
Follow the steps in the flowchart. Steps marked with a letter in a circle have supporting notes that you need to read.

Ownership flowchart notes:
G: START: Can you prove the vehicle is legally yours?
You will need evidence that you're legally entitled to the vehicle. You must have original documents that establish an ownership trail back to the last registered owner in Europe (eg deregistration or change of ownership papers) and invoices, bills of sale, receipts etc. You must have certified translations of any documents that aren't in English.
H: STOP
Don't ship the vehicle to New Zealand. If you can't prove that the vehicle is legally yours, you won't be able to register it for use on New Zealand roads.