There is clearly a need to codify into all of these historical acts that they can't be invoked unless there is a declaration of war (or some other appropriate prerequisite).

This administration consistently exploits what were designed to be emergency powers because no such requirement exists. Leave no room for interpretation.

The current administration scoffs at laws. Nothing stopping them in that case from declaring war on Nauru and doing all the same. The solution is a sane, informed electorate, which is much more difficult in this age where a few disgustingly rich people have so much influence over news and media.