<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Constitution of Australia is the supreme law under which the government of the Commonwealth of Australia operates, including its relationship to the States of Australia . It consists of several documents . The most important is the Constitution of the Commonwealth of Australia, which is referred to as the "Constitution" in the remainder of this article . The Constitution was approved in a series of referendums held over 1898--1900 by the people of the Australian colonies, and the approved draft was enacted as a section of the Commonwealth of Australia Constitution Act 1900 (Imp), an Act of the Parliament of the United Kingdom . </P> <P> 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 . </P>

Which parliament passed the act that contains the australian constitution