E1A10:If an amateur station is installed aboard a ship or aircraft, what condition must be met before the station is operated?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E1A10 is Its operation must be approved by the master of the ship or the pilot in command of the aircraft.

The key fact is Its operation must be approved by the master of the ship or the pilot in command of the aircraft. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.