well it's clearly not a dagger, its questionable whether its even a sword at this point and more of a curio/antique.
not sure anyone is going to be able to give you a definitive answer on the legal side of this.
do you have someone outside of victoria you could import it to? then just have them mail it to you? you get round the importing aspect then
looks like you'll still need to be a member of a registered collectors club, but that probably isn't difficult.