Good question, if you can work the CASA requirements out let me know please! I certainly can't and I have asked this question many times, with no logical and practical response.........
I suggest you use your own best judgement. Don't ask an FOI for god sake, unless you know him/her reasonably well!!!!
Good luck in getting a defiant and practical answer in terms of compliance with what ever CASA require.
Last edited by Duck Pilot; 31st May 2016 at 09:23.