Sec. 22.313  Station identification.

    The licensee of each station in the Public Mobile Services must 
ensure that the transmissions of that station are identified in 
accordance with the requirements of this section.
    (a) Station identification is not required for transmission by:
    (1) Stations in the Cellular Radiotelephone Service;
    (2) General aviation ground stations in the Air-ground 
Radiotelephone Service;
    (3) Rural subscriber stations using meteor burst propagation mode 
communications in the Rural Radiotelephone Service;
    (4) Stations using Basic Exchange Telephone Radio Systems in the 
Rural Radiotelephone Service;
    (5) Nationwide network paging stations operating on 931 MHz 
channels; or,
    (6) Stations operating pursuant to paging geographic area 
authorizations.
    (b) For all other stations in the Public Mobile Services, station 
identification must be transmitted each hour within five minutes of the 
hour, or upon completion of the first transmission after the hour. 
Transmission of station identification may be temporarily delayed to 
avoid interrupting the continuity of any public communication in 
progress, provided that station identification is transmitted at the 
conclusion of that public communication.
    (c) Station identification must be transmitted by telephony using 
the English language or by telegraphy using the international Morse 
code, and in a form that can be received using equipment appropriate for 
the modulation type employed, and understood without the use of 
unscrambling devices, except that, alternatively, station identification 
may be transmitted digitally, provided that the licensee provides the 
Commission with information sufficient to decode the digital 
transmission to ascertain the call sign. Station identification 
comprises transmission of the call sign assigned by the Commission to 
the station, however, the following may be used in lieu of the call 
sign.
    (1) For transmission from subscriber operated transmitters, the 
telephone number or other designation assigned by the carrier, provided 
that a written record of such designations is maintained by the carrier;
    (2) For general aviation airborne mobile stations in the Air-Ground 
Radiotelephone Service, the official FAA registration number of the 
aircraft;

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    (3) For stations in the Paging and Radiotelephone Service, a call 
sign assigned to another station within the same system.
[ 59 FR 59507 , Nov. 17, 1994, as amended at  59 FR 59955 , Nov. 21, 1994; 
 62 FR 11633 , Mar. 12, 1997]