Best to consult the local authorities. Anyone who wants to own/use a firearm must have a Firearms Licence and, with some exceptions, be over the age of 18. Owners must have secure storage for their firearms. Permit To Acquire is required. The first permit has a mandatory 28 day delay before issue. Some states waive for second and subsequent firearms of the same class. For each firearm a "Genuine Reason" must be given, relating to pest control, hunting, target shooting, or collecting. SELF DEFENSE IS NOT AN ACCEPTED REASON. Each firearm iMUST BE registered to the owner by serial number.
Your question is too broad for a Wikianswer. Australia has a number of gun laws. Some firearms are not permitted to be privately owned, others require a license.
As with all gun laws, it presumes that people that would commit murder, assault and robbery will obey a gun law.
The Australian Book of Laws
Australian 'A' Captured Gun Battery was created in 1918.
Not the UN, but laws passed by the Australian govt.
Australian laws are made by the government. National or local.
They are Australian.
In the entire U.S. there are an estimated 20,000 or more gun laws.
there made in canbera the Australian capital city
No matter WHERE you use a gun, there are laws that govern what you can and cannot do. If you do not know those laws, please do not own a gun.
Your question is an incorrect statement. Why do you think states must not enforce gun laws? They do.
That is too broad of a question to answer as asked. Is there some specific information you want about gun laws?
Literally, tens if not hundreds of thousands of laws. My copy of US state gun laws is about 2 inches thick. It is estimated that there are more than 20,000 gun laws in the US- and you are asking about "around the world".