"most local bi-laws are unconstitutional"
Interesting you have mentioned that.
The Commonwealth of Australia Constitution Act 1901 clearly does not recognize local councils as being a third tier of government.
The Constitution clearly states that only the federal government has the power to raise taxes, with a few exceptions for state taxes.
So clearly your local council cannot charge rates and taxes on your privately owned land, because it is not a federal government. In fact your local council is a corporation because it has an ABN. (please check your council rates notice). Governments do not have an ABN.
My local council appears unable to answer my short letters I have been sending them since May 2016 asking them to please provide in printed form (ie a letter) the exact law, the exact act and the exact section that states the payment of taxes on privately owned land is mandatory by the Commonwealth of Australia Constitution Act 1901.
They reply side stepping my questions and choose to send threatening and intimidating letters threatening legal action.
The Commonwealth Attorney-General for Australia side steps my short letters with indirect answers despite me asking for a simple "yes" or "no" answer to my very simple questions.
Other government departments appear unable to reply despite my continual follow up letters.
The entire NSW Local Government Act (1993) is unlawful since it has not received royal assent, and because the Commonwealth of Australia Constitution Act 1901 does not recognize this "law".
Also a number of state owned corporations are trading/operating unlawfully.
We are being duped.