When must an amateur radio station have a control operator?

Radio regulations require that every amateur radio station has a designated control operator present whenever the station is actively transmitting. This ensures that someone is always legally accountable for the signals being broadcast and can immediately stop the transmission if a problem occurs. While anyone is legally permitted to listen to amateur radio transmissions without a license, the act of transmitting requires a certified control operator. Distractors suggesting an operator is only needed for training or when operating a receiver represent a misunderstanding of this fundamental rule.