The airspace is not closed. If you have current M/R in force then your A/C needs to be kept airworthy which would mean the engine is to be kept in serviceable condition, IE operated. I flew right thru the last debacle! Stay within the state of Victoria (the leper colony). If stores like Bunnings and other non essential retail stores are allowed open then the 4 reasons to leave home are a joke! You can now play golf, fish etc, the fools this time realised that some activities are extreme low risk!