The British government made one change before the Bill was passed. The Chief Justices of the colonies wanted the right to appeal decisions of the High Court to the Privy Council on constitutional matters. They were worried that the limits of the powers of the Commonwealth or States could be changed by parliament. The British Parliament passed the "Commonwealth of Australia Constitution Act" in 1900. Western Australia finally agreed to join the Commonwealth in time for it to join the Commonwealth of Australia, which officially began on 1 January 1901.