Smaller than 20mm.
It is not legal to have a sloth as a pet in Western Australia, or in any other part of Australia.
If you mean the .50 BMG (there ARE other .50 caliber cartridges) it is a restricted firearm, requires licensing. There was a move to ban further imports of .50 cal BMG AMMO and rifles, but do not know where that stands.
No. Same-sex marriage is not currently legal anywhere in Australia.
No. It is not legal to shoot kookaburras anywhere in Australia, except in Tasmania. Kookaburras are native birds, and protected by law.
16 in Northern Territory, 17 in most states and territories and 18 in Victoria
Handguns are illegal in Australia without a very stringently-policed special permit.
It depends on what you wanna hunt mate. I've got a .223, .243, .300, and .375H&H, as well as a .22 and shotty. A .223 is the best calibre in my opinion if you arent looking for buffalo or bulls. If legal, I'd feel very comfortable shooting anything else in Australia with my .223. Good luck, let me know what you decide.
Yes, it can be carried if you fear for your safety and/or at risk and can be used in self defence.
In the US, Canada, Europe, and Australia, no. Polygamy is illegal in all 'western' countries. It is legal in some African, Middle Eastern, and Asian countries.
In 1933, Western Australia voted to secede from Australia. The result of the state referendum heavily favoured independence, however, it was rejected by the UK House of Commons on legal grounds.
In theory, it would be legal tender only in the micronation of Hutt River (some farmland in western Australia). Good luck with that....
It is so long as it is not driven on a public street or a public area