The Australian Constitution gives the power to make national laws to the Australian Parliament, that is, the House of Representatives and the Senate (the representatives of the Australian people) and the Governor-General (the Queen’s representative). The agreement of all three to a bill (proposed law) is required to make a law for Australia.
The Parliament’s law-making procedure allows for debate on and detailed examination of a bill, and for members of parliament to have their say. This ensures lots of different perspectives are shared and considered. The procedure also allows for a decision to be made on a bill quickly, if there is general agreement, or after extensive deliberation.
To find out about the law making process, check out this fact sheet on bills and laws.