Ultralights,
You clearly do not understand the threat to life and limb, the antipodean way of life, and the future of the human race, caused by taking photographs through a hole in the floor of an aeroplane.
Fear not, CASA is here to protect you and your fellow citizens.
Do not despair, you are in good company, the USA hasn't ever realised the need to "regulate" aerial photography either, beyond the aircraft complying with the normal rules of the air, airworthiness etc.
Australia has so often shown the way to the rest of the world in the "they should pass a law/there should be a rule" --- and not only for aviation.
This gets quite funny at times, it is often pointed out that CASA and its predecessors have never "had a go" at Dick Smith for his many magnificent books of aerial photography, but relentlessly pursued a chap in FNQ for fundamentally doing the same thing.
At one stage, many years ago, a particular Assistant Director of CASA developed the theory that, as only an aircraft that has a full ICAO Annex 8 C.of A can operate on an AOC, therefor photographs could only be taken from such an aircraft, and by some magical extension, and a leap of unfathomable "legal" logic, our laws covered "of", not just from.
That is, he stated that it was a criminal standard of naughtiness to take a picture of an aircraft that did not have a full C.of A. All in the interests of safety, you understand.
Just think of all those lovely air to air pics of, and taken from "Warbirds".
When I personally asked him what was he going to do about "enforcing the law" (his boss had just recently and very publicly announced that "all aviation law breakers had to be punished) given that photos of an "Experimental" aircraft had been very prominently been feature in the popular press and national TV news, that very day, contrary to (in his view) " the law", and presented to him proof of the "offense", the result was hilarious ---- for the rest of us.
The aircraft in question (this dates the period) was a prototype B777, long before certification, on its first visit to Australia, doing a bit of casual record setting --- I wonder, if it's VH- you need an AOC for that?? After all, isn't sponsorship just getting paid, therefor caught by CAR 206??
Tootle pip!!