47 CFR §87.481

1. (a)Radiobeacons may be licensed for unattended operation. An applicant must comply with the following:
   1. (1)The transmitter is crystal controlled and specifically designed for radiobeacon service and capable of transmitting by self-actuating means;
   2. (2)The emissions of the transmitter must be continuously monitored by a licensed operator, or by a direct positive automatic monitor, supplemented by aural monitoring at suitable intervals;
   3. (3)If as a result of aural monitoring it is determined that a deviation from the terms of the station license has occurred, the transmitters must be disabled immediately by a properly authorized person. If automatic monitoring is used, the monitor must insure that the operation of the transmitter meets the license terms or is disabled;
   4. (4)A properly authorized person must be able to reach the transmitter and disable it in a reasonable amount of time, so as not to adversely affect life or property in the air;
   5. (5)The equipment must be inspected at least every 180 days. Results of inspections must be kept in the station maintenance records;
   6. (6)The transmitter is not operable by or accessible to, other than authorized persons;
   7. (7)The transmitter is in a remote location.
2. (b)Authority for unattended operation must be expressly stated in the station license.