Flight training for AU licence in non VH reg
Can an AU licenced Flight Instructor provide endorsements or dual instruction in a non VH reg aircraft for which they do not have a foreign licence validation?
Scenario: I have a Thai registered aircraft, and operate that aircraft via a Thai validation on my AU licence., I wish to get some dual IR instruction or a BFR while I am in Australia with the aircraft, does the Instructor need to be Thai validated, or if I am PIC then is everything copacetic? Not an Issue under Thai law, but I can't find a requirement in the CARs that specifically address instruction in a non VH reg aircraft.
Any pointers to the appropriate rules would be much appreciated.