Wow, all the play book described in RA Heinlein's "Magic Inc"
The whole "tacking onto a spending bill" routine.
Here's the thing.
This has been running 10 years and frankly the BS excuses used to justify it first time round have now been shown to be BS excuses.
My instinct is fail to get to get it re-authorized by year end then re-challenge that "It's still valid till April". If that goes then they have to formally shut it down.
However without effective oversight (and I don't think there has been effective oversight) how can you know if the TLA's have done as they have been told?
As suspected once data fetishists get this sort of capability you may have to pry it out of their cold dead hands to stop them using it.