1. (a) Frequencies within the following bands may be assigned for use by low power auxiliary stations:

   26.100-26.480 MHz

   54.000-72.000 MHz

   76.000-88.000 MHz

   161.625-161.775 MHz (except in Puerto Rico or the Virgin Islands)

   174.000-216.000 MHz

   450.000-451.000 MHz

   455.000-456.000 MHz

   470.000-488.000 MHz

   488.000-494.000 MHz (except Hawaii)

   494.000-608.000 MHz

   653.000-657.000 MHz

   941.500-944.000 MHz

   944.000-952.000 MHz

   952.850-956.250 MHz

   956.45-959.85 MHz

   1435-1525 MHz

   6875.000-6900.000 MHz

   7100.000-7125.000 MHz

2. (b)

   1. (1) Operations in the bands allocated for TV broadcasting are limited to locations at least 4 kilometers outside the protected contours of co-channel TV stations shown in the following table. These contours are calculated using the methodology in § 73.684 of this chapter and the R-6602 curves contained in § 73.699 of this chapter.

      Table 1 to Paragraph (b)(1)

      Type of station	Protected contour
      Channel	Contour (dBu)	Propagation curve
      Digital: Full service TV, Class A TV, LPTV, translator and booster	Low VHF (2-6)	28	F(50,90)
      	High VHF (7-13)	36	F(50,90)
      	UHF (14-36)	41	F(50,90)

   2. (2) Low power auxiliary stations may operate closer to co-channel TV broadcast stations than the distances specified in paragraph (b)(1) of this section provided that such operations either—

      1. (i) Are coordinated with TV broadcast stations that could be affected by the low power auxiliary station operation, and coordination is completed prior to operation of the low power auxiliary station; or
      2. (ii) Are limited to an indoor location that is not being used for over-the-air television viewing, and the following conditions are met with respect to the TV channel used: The TV signal falls below a threshold of −84 dBm over the entire channel; the signal is scanned across the full 6 megahertz channel where the wireless microphones would be operated; and to the extent that directional antennas are used, they are rotated to the place of maximum signal.

3. (c) Specific frequency operation is required when operating within the 600 MHz duplex gap or the bands allocated for TV broadcasting.

   1. (1) The frequency selection shall be offset from the upper or lower band limits by 25 kHz or an integral multiple thereof.
   2. (2) One or more adjacent 25 kHz segments within the assignable frequencies may be combined to form a channel whose maximum bandwidth shall not exceed 200 kHz.
4. (d) Low power auxiliary licensees will not be granted exclusive frequency assignments.
5. (e) -(f) [Reserved]

[52 FR 2535, Jan. 23, 1987, as amended at 68 FR 12772, Mar. 17, 2003; 75 FR 3638, Jan. 22, 2010; 79 FR 48545, Aug. 15, 2014; 80 FR 71728, Nov. 17, 2015; 80 FR 73085, Nov. 23, 2015; 81 FR 4975, Jan. 29, 2016; 82 FR 41560, Sept. 1, 2017; 89 FR 83799, Oct. 18, 2024; 90 FR 57707, Dec. 12, 2025]