Sec. 73.210  Station classes.

    (a) The rules applicable to a particular station, including minimum 
and maximum facilities requirements, are determined by its class. 
Possible class designations depend upon the zone in which the station's 
transmitter is located, or proposed to be located. The zones are defined 
in Sec. 73.205. Allotted station classes are indicated in the Table of 
Allotments, Sec. 73.202. Class A, B1 and B stations may be authorized in 
Zones I and I-A, Class A, C3, C2, C1, and C stations may be authorized 
in Zone II.
    (b) The power and antenna height requirements for each class are set 
forth in Sec. 73.211. If a station has an ERP and an antenna HAAT such 
that it cannot be classified using the maximum limits and minimum 
requirements in Sec. 73.211, its class shall be determined using the 
following procedure:
    (1) Determine the reference distance of the station using the 
procedure in paragraph (b)(1)(i) of Sec. 73.211. If this distance is 
less than or equal to 28 km, the station is Class A; otherwise,
    (2) For a station in Zone I or Zone I-A, except for Puerto Rico and 
the Virgin Islands:
    (i) If this distance is greater than 28 km and less than or equal to 
39 km, the station is Class B1.
    (ii) If this distance is greater than 39 km and less than or equal 
to 52 km, the station is Class B.
    (3) For a station in Zone II:
    (i) If this distance is greater than 28 km and less than or equal to 
39 km, the station is Class C3.
    (ii) If this distance is greater than 39 km and less than or equal 
to 52 km, the station is Class C2.
    (iii) If this distance is greater than 52 km and less than or equal 
to 72 km, the station is Class C1.
    (iv) If this distance is greater than 72 km and less than or equal 
to 92 km, the station is Class C.
    (4) For a station in Puerto Rico or the Virgin Islands:
    (i) If this distance is less than or equal to 42 km, the station is 
Class A.
    (ii) If this distance is greater than 42 km and less than or equal 
to 46 km, the station is Class B1.
    (iii) If this distance is greater then 46 km and less than or equal 
to 78 km, the station is Class B.

[ 52 FR 37788 , Oct. 9, 1987;  52 FR 39920 , Oct. 26, 1987, as amended at  54 FR 16367 , Apr. 24, 1989;  54 FR 19374 , May 5, 1989;  54 FR 35339 , Aug. 25, 
1989]