Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?
Under no circumstances, FCC rules take priority
At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity✓Bonne réponse
Explication
PRB-1 did not give the FCC exclusive control of antenna regulation; it set a standard that local rules must meet. A local ordinance is valid only if it reasonably accommodates amateur communications and goes no further than the minimum practicable to serve a legitimate local purpose.