Hmm... I'll assume you're looking at the linerlock version of the Sage?
My recommendation, ask Lighthound to tighten the pivot before sending it through. As tight as possible.
I'd agree with R@ndom about there being a low chance of them confiscating it if it's sent "as is", but at the same time I can't honestly say that without mentioning the flip side and the requisite forms if it gets confiscated. Among the collectors I know, they've tightened up in the last 6 months or so.
If the officer in question manages to flick it open, they'll classify it as a gravity/flick knife, as per the part of
ACS's guide on importing knives, which states:
Flick knives (aka switchblade knives) or similar devices, with a
blade that opens automatically by either gravity or centrifugal force
or by pressure applied to a button, spring or device in or attached to
the handle of the device.
Note the centrifugal force bit. Doesn't mention how much, they could just test it with a light wrist flick, or do a full arm swing, I've heard of both.
If ACS declare it a flick knife, then you need to get a form (B709B) from your state police saying that you're allowed to have
whatever ACS has declared it is. So if ACS declares it to be a flick knife, no matter how wrong they may be in declaring it as such, you can either let it go (maybe send it back to the seller, you get charged for the shipping), argue directly against them (99% failure rate, I can tell you a real shocker story where even the AKC failed to convince them), or get Vic. police to say that you're legally allowed to own a flick knife (chances of that...:shakehead).
I will say again that it's a small chance that they'll confiscate it, but if it happens and they declare it a flick knife (the most likely thing they'll confiscate it for), all I can say is "good luck".
If you want, drop in over
here, it's pretty much our local knife forum.
Just realised that this was probably more info than you wanted, but as a knife collector in Australia, I feel kinda responsible to help inform others about the ins and outs of various situations.
Alternatively, if you want I can link you up to an Aussie supplier with very reasonable prices, see if they can get one in for you. You don't have to worry about ACS that way. I've spoken to the owners on several occasions and can vouch for them.