You are correct, most tunnels have 'leaky-pipe' antennas connected to mini cell stations. But when you get a Federal License for one, you agree to the ITU treaties.
Federal law trumps in this case, localities can't do this without permission from the FCC.
Clearly interstate commerce, the way I read the Constitution. And I'm not a fan of how the IC clause has been abused.
/johnny
“Although I suppose they are some form of government entity - so a bit more tricky than if it was some private company. “
Another good reason to privatize as much as possible.
Can you imagine if a city was developed by a private corporation so that all the land, roads and buildings were still owned by the corporation and never handed over to a government to become “public” spaces ? People can protest all they want, but not on private property, so they couldn’t actually disrupt anything within the city. Union thugs couldn’t block businesses because their picket lines would have to be outside the city limits.