The person speaking or otherwise communicating messages over an amateur station
The person who is the licensee of an amateur station
An amateur operator identified in the FCC database as responsible for transmissions and FCC rules compliance at a station license location
An amateur operator designated by the licensee of a station to be responsible for transmissions and FCC rules compliance at that station✓Bonne réponse
Explication
The station's license holder designates the control operator, who is answerable for the station's transmissions and rule compliance. The role is not defined by who is speaking, does not automatically fall to the license holder, and is not recorded in the FCC database.