No court has ever addressed the question. This post is still mostly current (in 2015, USA FREEDOM codified ranges similar to those discussed): https://www.eff.org/deeplinks/2014/04/warrant-canary-faq
No court has ever addressed the question. This post is still mostly current (in 2015, USA FREEDOM codified ranges similar to those discussed): https://www.eff.org/deeplinks/2014/04/warrant-canary-faq