Sec. 23.1  Definitions.

    Assigned frequency. The frequency coinciding with the center of an 
authorized bandwidth of emission.
    Authorized bandwidth. The maximum bandwidth authorized to be used by 
a station as specified in the station license. This shall be occupied 
bandwidth or necessary bandwidth, whichever is greater.
    Authorized reference frequency. A frequency having a fixed and 
specific position with respect to the assigned frequency.
    Authorized service. The term ``authorized service'' of a point-to-
point radiotelegraph or radiotelephone station means the transmission of 
public correspondence to a point of communication as defined herein 
subject to such special provisions as may be contained in the license of 
the station or in accordance with Sec. 23.53.
    Fixed public service. The term ``fixed public service'' means a 
radiocommunication service carried on between fixed stations open to 
public correspondence.
    Fixed public press service. The term ``fixed public press service'' 
means a limited radio communication service carried on between point-to-
point telegraph stations, consisting of transmissions by fixed stations 
open to limited public correspondence, of news items, or other material 
related to or intended for publication by press agencies, newspapers, or 
for public dissemination. In addition, these transmissions may be 
directed to one or more fixed points specifically named in a station 
license, or to unnamed points in accordance with the provisions of 
Sec. 23.53.

    Note: This section is not intended as a definition of any press 
classification. Correspondence admissible under any press classification 
is determined by the tariffs of the various common carriers on file with 
the Commission.

    Fixed station. The term ``fixed station'' in the fixed public or 
fixed public press service includes all apparatus used in rendering the 
authorized service at a particular location under a single instrument of 
authorization.
    Frequency tolerance. The maximum permissible departure by the center 
frequency of the frequency band occupied by an emission from the 
assigned frequency or by the carrier, or suppressed carrier, from the 
reference frequency.
    International fixed public radiocommunication service. A fixed 
service, the stations of which are open to public correspondence and 
which, in general, is intended to provide radiocommunication between any 
one of the contiguous 48 states (including the District of Columbia) and 
the State of Alaska, or the State of Hawaii, or any U.S. possession or 
any foreign point; or between any U.S. possession and any other point; 
or between the State of Alaska and any other point; or between the State 
of Hawaii and any other point. In addition, radiocommunications within 
the contiguous 48 states (including the District of Columbia) in 
connection with the relaying of international traffic between stations 
which provide the above service, are also deemed to be the international 
fixed public radiocommunications service; provided, however, that 
communications solely between Alaska, or any one of the contiguous 48 
states (including the District of Columbia), and either Canada or Mexico 
are not deemed to be in the international fixed public 
radiocommunication service when such radiocommunications are transmitted 
on frequencies above 72 MHz.
    International fixed public control service. A fixed service carried 
on for the purpose of communicating between

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transmitting stations, receiving stations, message centers or control 
points in the international fixed public radiocommunication service.
    Occupied bandwidth. The frequency bandwidth such that, below its 
lower and above its upper frequency limits, the mean powers radiated are 
each equal to 0.5 percent of the total mean power radiated by a given 
emission.
    Point-to-point telegraph station. The term ``point-to-point 
telegraph station'' means a fixed station authorized for radiotelegraph 
communication.
    Point-to-point telephone station. The term ``point-to-point 
telephone station'' means a fixed station authorized for radiotelephone 
communication.
    Point of communication. The term ``point of communication'' means a 
specific location designated in the license to which a station is 
authorized to communicate for the transmission of public correspondence.
    Radiotelegraph. The term ``radiotelegraph'' as used in this part 
shall be construed to include types N0N, A1A, A2A, A3C, F1B, F2B, and 
F3C emission.
    Radiotelephone. The term ``radiotelephone'' as used in this part, 
with respect to operation on frequencies below 30 MHz, means a system of 
radiocommunication for the transmission of speech or, in some cases, 
other sounds by means of amplitude modulation including double sideband 
(A3E), single sideband (R3E, H3E, J3E) or independent sideband (B3E) 
transmission.
[ 38 FR 22478 , Aug. 21, 1973, as amended at  49 FR 48701 , Dec. 14, 1984]