Gentlemen, Thank you very much for your advice
I knew that Australian gun laws were much more strict than America but I didn't know they were so with pocket knives...... Now having said that there are many states in America where assisted opening knives, auto opening(switch blades) and others are illegal as well.
Funny thing is that only a couple of years ago did they make it legal for people in Texas to carry knives with blades over 5.5"(14cm) as well as switchblades.
(From top to bottom- cigarette pack for scale)
1. is the knife I carry every day clipped to my pocket, and I mean literally everywhere I go and its a Benchmade switchblade- (I don't travel with this)
2. This small Gerber is what I usually travel with as its small and if either police or someone else takes offense to it then its rather cheap to replace - but from what you mention it can be opened with one hand and from what you say it sounds like it too would be illegal; I have traveled in Europe, Bahamas, Canada and central America with it clipped to my pocket - but once again thanks for telling me about this as it is literally the knife I was going to pack in my checked bag and carry with me while in your country.
3. This Spyderco Wayne Goddard is the knife I usually travel with as my non-skinning and gutting knife for hunting and fishing trips, but as you mention it can be opened with one hand holding it.