Literally hand picking any of these keywords pretty much leads to the same Wikipedia page discussing at least some of these things. I'm still reading it to see how complete it is. Again, where are you getting this information that the government has been more conservative or particular about these directives?
Ironically it actually has a fairly good record dating back to 2006 in several places when some of this stuff got stirred up that time. http://en.wikipedia.org/wiki/NSA_warrantless_surveillance_co...
The whole thing is insightful. (I edited this comment to be far less rude, my apologies, I should've slowed down)