At one stage we had a second aid kit installed which was a bottle of Port and 4 glasses on a rear bulkhead but we could not get a CAR 37 engineer to approve it.
It was used for celebration after a successful flight such as to AAAA fly ins.
I also saw in an earliar aeroplane , part of the Kings Flight, a rear toilet with a sign"not to be used over habitation".
There may be some areas in Sydney that such instructions become redundant - especially around Bankstown.