Cabotage?
xcel and others,
I do not understand this hang-up about cabotage. Cabotage in aviation is the legal restriction to domestic carriers of air transport between points within a country's borders.
It is about flags of registry, in this case the State that issued the AOC. Jetstar is an Australian domestic carrier and by definition cannot breach the laws of cabotage within Australia.
The whole aircraft can be crewed with martians (provided the pilots have valid CoVs) because it is the operator, not the crew or the State of registration of the aircraft, to which the laws of cabotage apply.