Mechanics of CALEA taps

Dear nanog: Honestly, I expect replies to this question to range between zero and none, but I have to ask it. I understand the CALEA tap mechanism for most ISPs, generally, works like this: * we outsource our CALEA management to company X * we don't even know there's been a request until we've gotten a bill from X. And that's the extent of it. Well, golly Slothrop, maybe someone else has started picking up the tab. Would you even know? Is that possible? Thanks, Randy Fischer