Comment by gizmo686

>By that time though, the NSL's would probably have served their purpose, and something else will have taken it's place.

I don't think so. Generally, the way it works in the US court systems is you have to break the law before you can challenge it in court. This means that, regardless of the eventual decision, you would have already revealed the NSL (or removed the canary), and the question is where you allowed to.