When was the Australian Constitution first written?
Constitution of Australia
1 January 1901
The Commonwealth of Australia Constitution Act 1900 (Imp) became law on 9 July 1900, and entered into force on 1 January 1901. Even though the Constitution was originally given legal force by an Act of the United Kingdom parliament, the Australia Act 1986 removed the power of the United Kingdom parliament to change the Constitution as in force in Australia, and the Constitution can now only be changed in accordance with the prescribed referendum procedures in Section 128.