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, C0 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 83 km,
   the station is Class C0.

   (v) If this distance is greater than 83 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;
    65 FR 79777 , Dec. 20, 2000]