Folks,
The drafting of Part 91 (and so much other aviation regulation) in the "negative" guarantees confusion and the creation of "inadvertent criminals".
There is no good reason for this, other than CASA choice, you take a topic, write a regulation to ban it, then follow with a string of exception, usually with multiple cross references to grossly increase likelihood of misunderstanding.
If the same "regulation" was written in the positive, what you can do, it would be far more straightforward to understand.
Then we get to the poor quality of the actual drafting, and this leaves so many avenues to argue what you can actually do.
Tootle pip!!