Parliament can specifically say "we know this law is unconstitutional, but we like it anyway, so it's staying for 5 years. And then we can renew it if we want." They may not want to do that, as it's a pretty strong thing to do, but they are absolutely able to.
All hail Empress Elizabeth II, terror of all the known world?
Laws and customs only mean as much as a government willing to be responsible to the people, as the NSA has shown everyone.
You would be quite mistaken to believe such hyper-legalistic logic only came into existence with The United States. The US only built on the myriad of legalese already put in place by the British, Byzantines[1], Romans, and Greeks, <insert dominate culture/country of the era>.
How do you think Julius Caesar came to power? He abused the laws put in place by the Roman Republic by refusing to step down at the end of his term.
[1] The Byzantines themselves[2] have become synonymous with "complex political system"
You are more correct than you could ever possibly imagine.
The Queen herself did nothing.
It certainly is. The syntax of the Australian Constitution sits firmly within British conventions of monarchical behaviour, buttressed by the Acts of Westminster and the Australia Acts.
We are an independent nation in custom and law. If Her Majesty tried to do anything, she would be ignored. If she sued, the High Court would politely explain that her role is entirely ceremonial and that Parliament is the supreme source of executive and legal power in Australia.
The principle that Parliament is supreme over Crown was established in British law before Australia was colonised. It's pretty well-accepted at this point that the royals have no power.
The Queen has never, and cannot, do so in right of Australia, because her powers are irrevocably and excludably delegated to the Australian Governor-General.
In terms of dissolving any Parliament nominally under her sovereignty, it can only be done by the Queen or a Governor-General upon advice. The Queen can't do it of her own initiative. Neither can the Governor-General. They have to be told to do it by the Government of the day.
(And mainly, I was just trying to bring up an interesting legal quirk of our constitution, since it's fairly unusual and most of HN's audience might not be aware of it).