Yes.
However, there are strict gun licence laws, and anyone who wants to own or use a firearm must have a Firearms Licence. As it currently stands, only a very small percentage (around 5%) of Australians actually own a gun.
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".