I think you're being downvoted for linking to your comments without explaining why they're relevant.

I would assume, though, given their scale, that someone at one of these companies has the necessary clearance to contest. I think FISA is being intentionally facetious, or rather technically. I find it impossible to believe no one has attempted, but find it plausible that the government has yet to give anyone standing to sue.

Finally, given the sovereign clause, I don't see why the government has to accept a lawsuit against them.