Sec. 78.113  Frequency monitors and measurements.

    (a) The licensee of each CARS station shall employ a suitable 
procedure to determine that the carrier frequency of each transmitter is 
maintained within the tolerance prescribed in Sec. 78.111 at all times. 
The determination shall be made, and the results thereof entered in the 
station records: when a transmitter is initially installed; when any 
change is made in a transmitter which may affect the carrier frequency 
or the stability thereof; or in any case at intervals not exceeding one 
year.
    (b) The choice of apparatus to measure the operating frequency is 
left to the discretion of the licensee. However, failure of the 
apparatus to detect departures of the operating frequency in excess of 
the prescribed tolerance will not be deemed an acceptable excuse for the 
violation.

[ 37 FR 3292 , Feb. 12, 1972, as amended at  41 FR 29696 , July 19, 1976;  50 FR 23422 , June 4, 1985]