Because the aerodrome is still owned Federally the owners are technically only leasing the land on a 99 year lease. Thus I do not think they are under any obligation to have council approval or state approval to do anything. They are in a void it would seem.
It would help if any who read this thread would write to the Minister of Aviation with their concerns and particularly as I have done to Mr Byron , head of CASA as they are the safety authority. There will be a sadness in Bankstown and I pray it will not be me or any of my close friends.