Watching with great interest.
I have checked your work as best I can and despite 11.010(3A)
I too can find no mention in 11.BA of any rules about duration of authorisations.
11.065 has a curious note:
Note:
Some kinds of authorisation continue indefinitely unless cancelled.
Others cease (unless sooner cancelled) at a time set by another provision of these Regulations.
Yet others cease (unless sooner cancelled) at a time set by CASA, subject to a maximum duration.
None of those sound like a rule, more so it is just commentary, based on - what?
I hold a CASA Authorisation for a certain activity, and it has a duration. When it is renewed each 2 years, it comes back identical to the previous, just under $500 later.
Why the duration and renewal for something that does not change, other than for a cash grab?