So....
All that means is that the operation an RA Aus aircraft is not exempt from the requirement to have an AOC and some of the other requirements that apply to a prescribed commercial operation.
Which leads back to the question: Is it a prescribed commercial operation?
The answer to that question is so complex that there are individual staff members of CASA who have been paid - literally - over $1,000,000 to answer the question during the last couple of decades. Those staff are, naturally, highly motivated to come up with a new, simple and clear, classification of operations system.