§ 90.267   Assignment and use of frequencies in the 450-470 MHz band for low
power use.

   (a) The following frequencies between 450-470 MHz are designated for
   low-power use subject to the provisions of this section. For purposes
   of this section these frequencies are referred to as “low power
   frequencies.” Pairs are shown but single frequencies are available for
   simplex operations.

   (b) Group A1 Frequencies. The Industrial/Business Pool frequencies in
   Group A1 are available on a coordinated basis, pursuant to
   § § 90.35(b)(2) and 90.175(b), as follows:

   (1) Group A1 frequencies are available for voice and non-voice
   operations on a co-primary basis. Base, mobile and operational fixed
   stations will be authorized on Group A1 frequencies. Fixed stations may
   be licensed as mobile.

   (2) Within 80 kilometers (50 miles) of the specified coordinates of the
   top 100 urban areas listed in § 90.741 of this chapter (“80 km circles”)
   only low power operation will be authorized. The coordinates of an
   operational fixed or base station and the geographic center (latitude
   and longitude) of a mobile area of operation determine whether a
   station is within an “80 km circle.”

   (i) The maximum ERP for low power operation on Group A1 frequencies is
   as follows:
   Operation Low side of frequency pair (watts) High side of frequency
   pair (watts)
   Operational Fixed or Base 20 6
   Mobile 6 6
   Portable 2 2

   (ii) The maximum antenna height for low power fixed stations on Group
   A1 frequencies will be 23 meters (75 feet) above ground.

   (3) Outside the “80 km circles” defined in paragraph (b)(2), full-power
   operational fixed, base, or mobile stations will be authorized as
   follows:

   (i) Power and antenna height limits are governed by § 90.205 of this
   chapter;

   (ii) For any operational fixed, base or mobile station exceeding the
   low power or antenna height limits listed in paragraph (b)(2), the 21
   dBu F(50,10) contour may not overlap any portion of an “80 km circle;”
   and,

   (iii) Wide area operations will not be permitted. The area of normal
   day-to-day operations will be described in the application in terms of
   maximum distance from a geographic center (latitude and longitude).

   (4) The Industrial/Business Pool Group A1 Low Power Frequencies are as
   follows:
   451/456.18125 451/456.58125 452/457.10625        452/457.70625
   451/456.1875  451/456.5875  452/457.1125         452/457.7125
   451/456.19375 451/456.59375 452/457.11875        452/457.71875
   451/456.28125 451/456.60625 452/457.13125        452/457.78125
   451/456.2875  451/456.6125  452/457.1375         452/457.7875
   451/456.29375 451/456.61875 452/457.14375        452/457.79375
   451/456.30625 451/456.65625 452/457.15625        452/457.80625
   451/456.3125  451/456.6625  452/457.1625         452/457.8125
   451/456.31875 451/456.66875 452/457.16875        452/457.81875
   451/456.35625 451/456.68125 452/457.18125        452/457.83125
   451/456.3625  451/456.6875  452/457.1875         452/457.8375
   451/456.36875 451/456.69375 452/457.19375        452/457.84375
   451/456.38125 451/456.70625 452/457.28125        452/457.88125
   451/456.3875  451/456.7125  452/457.2875         452/457.8875
   451/456.39375 451/456.71875 452/457.29375        452/457.89375
   451/456.40625 451/456.73125 452/457.48125        452/457.98125
   451/456.4125  451/456.7375  452/457.4875         452/457.9875
   451/456.41875 451/456.74375 452/457.49375        452/457.99375
   451/456.45625 451/456.75625 452.53125 (unpaired) 462/467.18125
   451/456.4625  451/456.7625  452.5375 (unpaired)  462/467.1875
   451/456.46875 451/456.76875 452.54375 (unpaired) 462/467.19375
   451/456.48125 452/457.03125 452/457.63125        462/467.45625
   451/456.4875  452/457.0375  452/457.6375         462/467.4625
   451/456.49375 452/457.04375 452/457.64375        462/467.46875
   451/456.50625 452/457.05625 452/457.65625        462/467.48125
   451/456.5125  452/457.0625  452/457.6625         462/467.4875
   451/456.51875 452/457.06875 452/457.66875        462/467.49375
   451/456.55625 452/457.08125 452/457.68125        462/467.50625
   451/456.5625  452/457.0875  452/457.6875         462/467.5125
   451/456.56875 452/457.09375 452/457.69375        462/467.51875

   (c) Group A2 Frequencies. The Industrial/Business Pool frequencies in
   Group A2 are available nationwide on a coordinated basis, pursuant
   § § 90.35(b)(2) and 90.175(b) as follows:

   (1) Group A2 frequencies are available for voice and non-voice
   operations on a co-primary basis. Base, mobile or operational fixed
   stations will be authorized on Group A2 frequencies. Fixed stations may
   be licensed as mobile.

   (2) Low power operation will be authorized nationwide on Group A2
   frequencies.

   (i) The maximum ERP for low power operation on these frequencies is as
   follows:
   Operation Low side of frequency pair High side of frequency pair
   (watts)
   Operational Fixed or Base 20 6
   Mobile 6 6
   Portable 2 2

   (ii) The maximum antenna height for low power fixed stations will be 23
   meters (75 feet) above ground.

   (3) The Industrial/Business Pool Group A2 Low Power Frequencies are as
   follows:
   451/456.23125 451/456.53125 452/457.40625 452/457.85625
   451/456.2375  451/456.5375  452/457.4125  452/457.8625
   451/456.24375 451/456.54375 452/457.41875 452/457.86875
   451/456.33125 451/456.63125 452/457.50625
   451/456.3375  451/456.6375  452/457.5125
   451/456.34375 451/456.64375 452/457.51875
   451/456.43125 452/457.30625 452/457.75625
   451/456.4375  452/457.3125  452/457.7625
   451/456.44375 452/457.31875 452/457.76875

   (d) Group B Frequencies. The Industrial/Business Pool frequencies in
   Group B are available nationwide on a coordinated basis, pursuant to
   § § 90.35(b)(2) and 90.175(b) as follows:

   (1) Group B frequencies are available for non-voice operations on a
   primary basis. Voice operations will be permitted on a secondary basis.
   Base, mobile or operational fixed stations will be authorized on Group
   B frequencies. Fixed stations may be licensed as mobile.

   (2) Operation on these frequencies is limited to 6 watts ERP for base,
   mobile or operational fixed stations and 2 watts ERP for portable
   units. A maximum antenna height of 7 meters (20 ft) above ground is
   authorized for fixed stations.

   (3) The Industrial/Business Pool Group B Frequencies are as follows:
   462/467.20625 462/467.28125 462/467.35625 462/467.43125
   462/467.2125  462/467.2875  462/467.3625  462/467.4375
   462/467.21875 462/467.29375 462/467.36875 462/467.44375
   462/467.23125 462/467.30625 462/467.38125
   462/467.2375  462/467.3125  462/467.3875
   462/467.24375 462/467.31875 462/467.39375
   462/467.25625 462/467.33125 462/467.40625
   462/467.2625  462/467.3375  462/467.4125
   462/467.26875 462/467.34375 462/467.41875

   (e) Group C Frequencies. The Industrial/Business Pool frequencies in
   Group C are available nationwide for non-coordinated itinerant use as
   follows.

   (1) Group C frequencies are available for voice and non-voice
   operations on a co-primary basis. Only mobile operations will be
   authorized on Group C frequencies. Stations may operate at fixed
   locations for a temporary period of time. No stations operating at a
   permanent fixed location will be authorized on Group C frequencies.

   (2) Operation on these frequencies is limited to 6 watts effective
   radiated power for fixed or mobile units and 2 watts ERP for portable
   units. Stations operating at fixed locations for a temporary period of
   time will be limited to an antenna height of 7 meters (20 feet) above
   ground.

   (3) The Industrial/Business Pool Group C Low Power Frequencies are as
   follows:
   461/466.03125 461/466.15625 461/466.28125       462.8125
   461/466.0375  461/466.1625  461/466.2875        462.8375 (unpaired)
   461/466.04375 461/466.16875 461/466.29375       462/467.8625
   461/466.05625 461/466.18125 461/466.30625       462/467.8875
   461/466.0625  461/466.1875  461/466.3125        462/467.9125
   461/466.06875 461/466.19375 461/466.31875       464/469.48125
   461/466.08125 461/466.20625 461/466.33125       464/469.4875
   461/466.0875  461/466.2125  461/466.3375        464/469.5125
   461/466.09375 461/466.21875 461/466.34375       464/469.51875
   461/466.10625 461/466.23125 461/466.35625       464/469.53125
   461/466.1125  461/466.2375  461/466.3625        464/469.5375
   461/466.11875 461/466.24375 461/466.36875       464/469.5625
   461/466.13125 461/466.25625 462.7625 (unpaired) 464/469.56875
   461/466.1375  461/466.2625  462.7875 (unpaired)
   461/466.14375 461/466.26875 462.8125 (unpaired)

   (f) Group D Frequencies. The Industrial/Business Pool frequencies in
   Group D are available on a coordinated basis, pursuant to § § 90.35(b)(2)
   and 90.175(b). Central station alarm signaling on these frequencies are
   co-primary with regard to co-channel or adjacent channel base, mobile
   or data operations.

   (1) Base, mobile or operational fixed stations will be authorized on
   Group D frequencies. Fixed stations may be licensed as mobile.

   (2) Unless concurrence is obtained in accordance with section 90.175(b)
   of this chapter from the Commission-certified frequency coordinator for
   frequencies designated for central station alarm operations, Group D
   frequencies subject to § 90.35(c)(63) are limited to central station
   alarm use within the urban areas described in § 90.35(c)(63). Outside
   the urban areas described in § 90.35(c)(63), Group D frequencies subject
   to § 90.35(c)(63) are available for general Industrial/Business use on a
   coordinated basis, pursuant to § 90.35(b)(2) and § 90.175(b).

   (3) Unless concurrence is obtained in accordance with section 90.175(b)
   of this chapter from the Commission-certified frequency coordinator for
   frequencies designated for central station alarm operations, Group D
   frequencies subject to § 90.35(c)(66) are limited to central station
   alarm use nationwide.

   (4) Operation on Group D frequencies is limited to 2 watts output power
   for mobile, base or operational fixed stations. Fixed stations used for
   central station alarm operations may utilize antennas mounted not more
   than 7 meters (20 feet) above a man-made supporting structure,
   including antenna structure.

   (5) The Industrial/Business Pool Group D Low Power Frequencies are as
   follows:
   460/465.90625 460/465.95625 461/466.00625
   460/465.9125  460/465.9625  461/466.0125
   460/466.91875 460/465.96875 461/466.01875
   460/465.93125 460/465.98125
   460/465.9375  460/465.9875
   460/465.94375 460/465.99375

   (g) Low Power Public Safety Frequencies. The frequencies in the Public
   Safety Pool Low Power Group are available nationwide on a coordinated
   basis, pursuant to § § 90.20(c)(2) and 90.175(b).

   (1) Base, mobile or operational fixed stations will be authorized on
   Public Safety Low Power frequencies. Fixed stations may be licensed as
   mobile.

   (2) Operation on these frequencies is limited to 6 watts effective
   radiated power for base, mobile or operational fixed stations and 2
   watts ERP for portable units. A maximum antenna height of 7 meters (20
   feet) above ground is authorized for fixed stations.

   (3) The Public Safety Pool Low Power Frequencies are as follows:
   453/458.03125 453/458.13125 453/458.95625 460/465.53125
   453/458.0375  453/458.1375  453/458.9625  460/465.5375
   453/458.04375 453/458.14375 453/458.96875 460/465.54375
   453/458.05625 453/458.88125 453/458.98125 460/465.55625
   453/458.0625  453/458.8875  453/458.9875  460/465.5625
   453/458.06875 453/458.89375 453/458.99375 460/465.56875
   453/458.08125 453/458.90625 460/465.48125
   453/458.0875  453/458.9125  460/465.4875
   453/458.09375 453/458.91875 460/465.49375
   453/458.10625 453/458.93125 460/465.50625
   453/458.1125  453/458.9375  460/465.5125
   453/458.11875 453/458.94375 460/465.51875

   (h) Unless otherwise noted, the following conditions apply to all low
   power frequencies:

   (1) Except for itinerant operations on Group C, wide area operations
   will not be authorized. The area of normal day-to-day operations will
   be described in the application in terms of maximum distance from a
   geographic center (latitude and longitude).

   (2) A hospital or health care institution holding a license to operate
   a radio station under this part may operate a medical radio telemetry
   device with an output power not to exceed 20 milliwatts without
   specific authorization from the Commission. All licensees operating
   under this authority must comply with the requirements and limitations
   set forth in this section.

   (3) No limit shall be placed on the length or height above ground level
   of any commercially manufactured radiating transmission line when the
   transmission line is terminated in a non-radiating load and is routed
   at least 7 meters (20 feet) interior to the edge of any structure or is
   routed below ground level.

   (4) Sea-based stations may utilize antennas mounted not more than 7
   meters (20 feet) above a man-made supporting structure, including
   antenna structures.

   (5) Continuous carrier operations are prohibited on these frequencies.

   (6) Unless specified elsewhere in this part, licensees as of August 5,
   1999, licensed for operations with an emission designator wider than
   11.25 kHz on low power frequencies that are subject to an authorized
   bandwidth of 11.25 kHz, may obtain primary status with respect to
   co-channel licensees by supplying their coordinates to the Commission.
   These licensees will continue to operate on a secondary basis with
   respect to adjacent channel licensees. Additionally, these licensees
   may continue to operate with an authorized bandwidth wider than 11.25
   kHz on such low power frequencies, subject to the provisions of
   § 90.209(b) of this chapter.

   (7) Unless specified elsewhere in this part, licensees as of August 5,
   1999, licensed for operations with an emission designator wider than
   11.25 kHz on frequencies that are subject to an authorized bandwidth of
   11.25 kHz, which are not low power frequencies, may obtain primary
   status with respect to co-channel licensees by modifying their license
   to low power frequencies, supplying their coordinates to the
   Commission, and otherwise complying with the conditions of paragraphs
   (b) through (g) of this section. These licensees will continue to
   operate on a secondary basis with respect to adjacent channel
   licensees. Additionally, these licensees may continue to operate with
   an authorized bandwidth wider than 11.25 kHz on such low power
   frequencies, subject to the provisions of § 90.209(b) of this chapter.

   (8) Applicants proposing to operate with an authorized bandwidth wider
   than 11.25 kHz, on low power frequencies that are subject to an
   authorized bandwidth of 11.25 kHz, may be licensed on a secondary,
   non-interference basis. Such applicants are subject to the conditions
   of paragraphs (b) through (g) of this section and the provisions of
   § 90.209(b) of this chapter.

   [ 68 FR 19461 , Apr. 21, 2003;  68 FR 55319 , Sept. 25, 2003, as amended at
    69 FR 4254 , Jan. 29, 2004;  75 FR 19284 , Apr. 14, 2010;  83 FR 61097 ,
   Nov. 27, 2018]

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