Doesn't 911 use location services to determine which emergency services to contact and to provide location information to emergency services? Is this a function that people would want disabled for privacy reasons?
It's not allowed to be disabled, by law (FCC regulation). However, if you remember, Qualcomm had a standard on their CDMA pre-smartphones that the location icon would always show, it would be in either "E911 only" or "generally enabled". Apple I think made the first CDMA device that didn't show it.
Further, Apple and others implement a very obvious 911 override enabled notification, I recall it's a red bar on every screen, like the background location active.
Prohibited locations? What possible use could this have unless the owner was working out of a classified military base?
To expand, UWB works by literally transmitting over everybody else's signal at once, including things like weather radar, Wi-Fi, point-to-point, satellite TV, etc. The idea is that it spreads the interference out over so many people, the effect to an individual user is small. This understandably gets regulators worried; the FCC took, I think, a decade to finally approve UWB in the US. Other countries haven't gotten to that state yet.