tomooh said..
you can easily reg it as a nz boat if you are a nzer. it will cost around 900 for 5 years and you will only need a cat one certificate if you sail it to nz and then want to leave again, but you could sail out of Aus . As a NZ citizen if you take the boat to nz you will likely have to pay duty etc on arrival unless you can prove that it has already been paid . If you don,t want to sail to nz it may be worthwhile, no survey required.
Hi Tomooh
Yeah I went through all that with my last boat and it was an easy process. It seems though that you can't transfer that NZ registration to another boat or another owner. Basically that $1000 is gone if you sell your boat.
The boat I have just purchased is already Australian registered and it would be a shame to have to cancel that and then pay another $1000 for the NZ rego. But it looks like I won't be able to transfer this Oz rego as I'm not an Australian permanent resident.