Sec. 73.506  Classes of noncommercial educational FM stations and 
          channels.

    (a) Noncommercial educational stations operating on the channels 
specified in Sec. 73.501 are divided into the following classes:
    (1) A Class D educational station is one operating with no more than 
10 watts transmitter power output.
    (2) A Class D educational (secondary) station is one operating with 
no more than 10 watts transmitter power output in accordance with the 
terms of Sec. 73.512 or which has elected to follow these requirements 
before they become applicable under the terms of Sec. 73.512.
    (3) Noncommercial educational FM (NCE-FM) stations with more than 10 
watts transmitter power output are classified as Class A, B1, B, C3, C2, 
C1, or C depending on the station's effective radiated power and antenna 
height above average terrain, and on the zone in which the station's 
transmitter is located, on the same basis as set forth in Secs. 73.210 
and 73.211 for commercial stations.
    (b) Any noncommercial educational station except Class D may be 
assigned to any of the channels listed in Sec. 73.501. Class D 
noncommercial educational FM stations applied for or authorized

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prior to June 1, 1980, may continue to operate on their authorized 
channels subject to the provisions of Sec. 73.512.

[43 1997 FR 39715 , Sept. 6, 1978, as amended at  49 FR 10264 , Mar. 20, 1984; 
 52 FR 47569 , Dec. 15, 1987;  54 FR 16367 , Apr. 24, 1989;  54 FR 19374 , May 
5, 1989]