Regarding amateur radio, the National Radio Quiet Zone web page makes reference only to repeaters and beacon stations. I see no mention of fixed stations. Nor any reference to Part 95 (CB), but they do make reference to AM broadcast transmitters.
Rule 1.924 may apply to CB, but I'm not sure that amateur radio falls under the definition of "Personal Radio".
Applicable Radio Services
The radio services that are affected by the NRQZ and the FCC rules that discuss them are:
FCC Rule Radio Service
1.924 Public Mobile, Wireless Communications, Maritime, Aviation, Private Land Mobile, Personal Radio, Fixed Microwave
101.105(a)(7) Fixed Microwave Services
23.20(b) International Fixed Public
25.203(f) Satellite Communications
73.1030(a) Radio Broadcast
74.12, 74.24(i) Exp., Aux., and Special Broadcast
78.19(c) Cable Television Relay
97.203(e),
97.205(f) Amateur Radio (repeaters, beacons)
NRQZ coordination is also required for the Personal Communications Service (FCC Part 24) and the General Wireless Communications Service (FCC Part 26). These services are not exempt from NRQZ coordination under geographic area licensing.
http://www.gb.nrao.edu/nrqz/nrqz.shtml#ApplRadServIt would be interesting to find out what restrictions are placed on electric utilities regarding power line noise radiation, beyond the zone where underground wiring is required. If the utility company serving the quiet zone can live with the limitations, maybe, by extension, they could be imposed on all utilities nationwide.
Do the utilities remain in compliance by strict maintenance of conventional power distribution hardware, or do they use special hardware less prone to failure? I would like to see an estimate of how much electrical rates would have to be increased to cover the costs of putting all power lines underground.