Sec. 5.3  Definition of terms.

    For the purpose of this part, the following definitions shall be 
applicable. For other definitions, refer to part 2 of this chapter 
(Frequency Allocations and Radio Treaty Matters; General Rules and 
Regulations).
    (a) Authorized frequency. The frequency assigned to a station by the 
Commission and specified in the instrument of authorization.
    (b) Authorized power. The power assigned to a radio station by the 
Commission and specified in the instrument of authorization. The 
authorized power

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does not necessarily correspond to the power used by the Commission for 
purposes of its Master Frequency Record (MFR) and notification to the 
International Telecommunication Union.
    (c) Experimental Radio Service. A service in which Radio waves are 
employed for purposes of experimentation in the radio art or for 
purposes of providing essential communications for research projects 
which could not be conducted without the benefit of such communications.
    (d) Experimental Station. A station utilizing radio waves in 
experiments with a view to the development of science or technique
    (e) [Reserved]
    (f) Fixed service. A service of radio-communication between 
specified fixed points.
    (g) Fixed station. A station in the fixed service.
    (h) Harmful interference. Any radiation or any induction which 
endangers the functioning of a radionavigation service or of a safety 
service or obstructs or repeatedly interrupts a radio service operating 
in accordance with the Table of Frequency Allocations and other 
provisions of part 2 of this chapter.
    (i) Landing area. As defined by Title I, section I (22) of the Civil 
Aeronautics Act of 1938, as amended, landing area means any locality, 
either of land or water, including airdromes and intermediate landing 
fields, which is used, or intended to be used, for the landing and take-
off of aircraft, whether or not facilities are provided for the shelter, 
servicing, or repair of aircraft, or for receiving or discharging 
passengers or cargo.
    (j) Land station. A station in the mobile service not intended for 
operation while in motion.
    (k) Mobile service. A service of radiocommunication between mobile 
and land stations, or between mobile stations.
    (l) Mobile station. A station in a mobile service intended to be 
used while in motion or during halts at unspecified points.
    (m) Mean power of radio transmitter. The power supplied to the 
antenna during normal operation, averaged over a time sufficiently long 
compared to the period corresponding to the lowest frequency encountered 
in actual modulation.
    (n) Peak power of a radio transmitter. The mean power supplied to 
the antenna during one radio frequency cycle at the highest crest of the 
modulation envelope, taken under conditions of normal operation.
    (o) Person. An individual, partnership, association, joint stock 
company, trust, or corporation.
    (p) Public correspondence. Any telecommunication which the offices 
and stations, by reason of their being at the disposal of the public, 
must accept for transmission.
    (q) Radio service. An administrative subdivision of the field of 
radio-communication. In an engineering sense, the subdivisions may be 
made according to the method of operation, as, for example, mobile 
service and fixed service. In a regulatory sense, the subdivisions may 
be descriptive of particular groups of licensees, as, for example, the 
groups of persons licensed under this part.
    (r) Station authorization. Any construction permit, license, or 
special temporary authorization issued by the Commission.
[ 28 FR 12506 , Nov. 22, 1963, as amended at  48 FR 52737 , Nov. 22, 1983]