Sec. 80.810  Use of reserve installation.

    The reserve transmitter, and the reserve power supply for the 
reserve transmitter, are primarily for safety and test communication. 
This equipment may be used for other communication for a period not to 
exceed 1 hour per day in the aggregate. The reserve receiver, and the 
reserve power supply for the reserve receiver if a battery, may be used 
at any time to maintain a safety watch if such use will not reduce the 
capabilities of the reserve power supply to energize the associated 
component or components of the reserve installation for at least 6 
consecutive hours.