AerocatS2A - My understanding is - are you sitting down for this?
If you used TTMRA to transfer from NZ to AUS you cannot then TTMRA AUS back to NZ (and vice versa) you have to comply with condx already stated. ie that of the country where licence was originally issued.
However if you transferred prior to TTMRA and did it the old way, ie hours recognised but still have to do exams and flight tests and have the licence issued from scratch as it were I think you probably should qualify to TTMRA back. Probably be issued as a brand new TTMRA licence, not as revalidating your old one, I would think.
But! Don't take my word for it. That is what it used to be, it may have changed and their website used to have pretty good info which it still might.