I'll be honest, I'm still tired from last night lol, too much so to go digging. We're also talking about something that has been the norm for more than a decade now - Google have long since established their processes for dealing with government requests. This may have started sometime around 2012, perhaps even earlier. I probably read it in an Ars Technica article, at a guess, but it could also have been something I stumbled upon on reddit.