What is the maximum permissible duration of a remotely controlled station’s transmissions if its control link malfunctions?

When operating a remotely controlled amateur radio station, maintaining a reliable control link is critical to ensure the station complies with FCC regulations. If this control link fails, the station could potentially become stuck in transmit mode, causing continuous harmful interference. To prevent this, FCC Part 97 rules require that the station include an automatic timer or failsafe mechanism. This mechanism must completely terminate the station's transmissions within 3 minutes of a control link malfunction. Distractors like 5 or 10 minutes are too long to allow an uncontrolled carrier, and 30 seconds is unnecessarily strict for temporary link drops, making 3 minutes the precise regulatory standard.