Strictly speaking, they're allowed to operate in a non-interfering manner (which they're apparently doing) in any band without consultation. It's only after a country complains that there's interference that we can just the US's diplomatic method.
Exactly. They're operating in the "no harm, no foul" rules and are mostly fine according to a strict understanding of the treaties. The point of it is to show that there's not really anyone coordinating it.