1. Regulations
  2. title 47
  3. chapter I-i4
  4. part 90
  5. subpart K
  6. § 90.273

View all text of Subpart K [§ 90.251 - § 90.283]

§ 90.273 - Availability and use of frequencies in the 421-430 MHz band.

The frequency bands 422.1875-425.4875 MHz and 427.1875-429.9875 MHz are available for use in the Detroit, Michigan and Cleveland, Ohio areas. The bands 423.8125-425.4875 MHz and 428.8125-429.9875 MHz are available for use in the Buffalo, New York area. Sections 90.273 through 90.281 address the specific rules applicable to these bands. Use of these bands is also subject to the general technical standards and application procedures contained in other subparts of part 90. The technical standards applicable in this band are the same as those contained in subpart I of part 90 for the 450-470 MHz band. Private land mobile use of these frequencies is subject to accepting any interference from Federal Government radiolocation operations.

(a) The following tables list frequencies available for assignment in the Public Safety and Industrial/Business Pools as indicated. In the tables, the Public Safety Pool frequencies are denoted as “PS” and the Industrial/Business Pool frequencies are denoted as “IB.” The frequencies 422.19375 MHz through 424.99375 MHz are paired with frequencies 427.19375 MHz through 429.99375 MHz, respectively. Only the lower half of each frequency pair, available for base station operation, is listed in the tables. Corresponding mobile and control station frequencies are 5 MHz higher than the base station frequency. The frequencies 425.000 through 425.48125 are unpaired and are available for either single frequency dispatch or paging operations.

Table 1—Channels Available in Detroit and Cleveland Areas Only

Frequency (MHz) Pool in which assigned Paired channels: 422.19375 *IB 422.200IB 422.20625 *IB 422.21250IB 422.21875 *IB 422.225IB 422.23125 *IB 422.23750IB 422.24375 *IB 422.250IB 422.25625 *IB 422.26250IB 422.26875 *IB 422.275IB 422.28125 *IB 422.28750IB 422.29375 *IB 422.300IB 422.30625 *IB 422.31250IB 422.31875 *IB 422.325IB 422.33125 *IB 422.33750IB 422.34375 *IB 422.350IB 422.35625 *IB 422.36250IB 422.36875 *IB 422.375IB 422.38125 *IB 422.38750IB 422.39375 *IB 422.400IB 422.40625 *IB 422.41250IB 422.41875 *IB 422.425IB 422.43125 *IB 422.43750IB 422.44375 *IB 422.450IB 422.45625 *IB 422.46250IB 422.46875 *IB 422.475IB 422.48125 *IB 422.48750IB 422.49375 *IB 422.500IB 422.50625 *IB 422.51250IB 422.51875 *IB 422.525IB 422.53125 *IB 422.53750IB 422.54375 *IB 422.550IB 422.55625 *IB 422.56250IB 422.56875 *IB 422.575IB 422.58125 *IB 422.58750IB 422.59375 *IB 422.600IB 422.60625 *IB 422.61250IB 422.61875 *IB 422.625IB 422.63125 *IB 422.63750IB 422.64375 *IB 422.650IB 422.65625 *IB 422.66250IB 422.66875 *IB 422.675IB 422.68125 *IB 422.68750IB 422.69375 *IB 422.700IB 422.70625 *IB 422.71250IB 422.71875 *IB 422.725IB 422.73125 *IB 422.73750IB 422.74375 *IB 422.750IB 422.75625 *IB 422.76250IB 422.76875 *IB 422.775IB 422.78125 *IB 422.78750IB 422.79375 *IB 422.800IB 422.80625 *IB 422.81250IB 422.81875 *IB 422.825IB 422.83125 *IB 422.83750IB 422.84375 *IB 422.850IB 422.85625 *IB 422.86250IB 422.86875 *IB 422.875IB 422.88125 *IB 422.88750IB 422.89375 *IB 422.900IB 422.90625 *IB 422.91250IB 422.91875 *IB 422.925IB 422.93125 *IB 422.93750IB 422.94375 *IB 422.950IB 422.95625 *IB 422.96250IB 422.96875 *IB 422.975IB 422.98125 *IB 422.98750IB 422.99375 *IB 423.000PS 423.00625 *PS 423.01250PS 423.01875 *PS 423.025PS 423.03125 *PS 423.03750PS 423.04375 *PS 423.050PS 423.05625 *PS 423.06250PS 423.06875 *PS 423.075PS 423.08125 *PS 423.08750PS 423.09375 *PS 423.100PS 423.10625 *PS 423.11250PS 423.11875 *PS 423.125PS 423.13125 *PS 423.13750PS 423.14375 *PS 423.150PS 423.15625 *PS 423.16250PS 423.16875 *PS 423.175PS 423.18125 *PS 423.18750PS 423.19375 *PS 423.200PS 423.20625 *PS 423.21250PS 423.21875 *PS 423.225PS 423.23125 *PS 423.23750PS 423.24375 *PS 423.250PS 423.25625 *PS 423.26250PS 423.26875 *PS 423.275PS 423.28125 *PS 423.28750PS 423.29375 *PS 423.300PS 423.30625 *PS 423.31250PS 423.31875 *PS 423.325PS 423.33125 *PS 423.33750PS 423.34375 *PS 423.350PS 423.35625 *PS 423.36250PS 423.36875 *PS 423.375PS 423.38125 *PS 423.38750PS 423.39375 *PS 423.400PS 423.40625 *PS 423.41250PS 423.41875 *PS 423.425PS 423.43125 *PS 423.43750PS 423.44375 *PS 423.450PS 423.45625 *PS 423.46250PS 423.46875 *PS 423.475PS 423.48125 *PS 423.48750PS 423.49375 *PS 423.500PS 423.50625 *PS 423.51250PS 423.51875 *PS 423.525PS 423.53125 *PS 423.53750PS 423.54375 *PS 423.550PS 423.55625 *PS 423.56250PS 423.56875 *PS 423.575PS 423.58125 *PS 423.58750PS 423.59375 *PS 423.600PS 423.60625 *PS 423.61250PS 423.61875 *PS 423.625PS 423.63125 *PS 423.63750PS 423.64375 *PS 423.650PS 423.65625 *PS 423.66250PS 423.66875 *PS 423.675PS 423.68125 *PS 423.68750PS 423.69375 *PS 423.700PS 423.70625 *PS 423.71250PS 423.71875 *PS 423.725PS 423.73125 *PS 423.73750PS 423.74375 *PS 423.750PS 423.75625 *PS 423.76250PS 423.76875 *PS 423.775PS 423.78125 *PS 423.78750PS 423.79375 *PS 423.800PS 423.80625 *PS

* This frequency will be assigned with an authorized bandwidth not to exceed 6 kHz.

Table 2—Channels Available in Buffalo, Detroit and Cleveland Areas

Frequency (MHz) Pool in which assigned Paired channels: 423.81875 *PS 423.825PS 423.83125 *PS 423.83750PS 423.84375 *PS 423.850PS 423.85625 *PS 423.86250PS 423.86875 *PS 423.875PS 423.88125 *PS 423.88750PS 423.89375 *PS 423.900PS 423.90625 *PS 423.91250PS 423.91875 *PS 423.925PS 423.93125 *PS 423.93750PS 423.94375 *PS 423.950PS 423.95625 *PS 423.96250PS 423.96875 *PS 423.975PS 423.98125 *PS 423.98750PS 423.99375 *PS 424.000PS 424.00625 *PS 424.01250PS 424.01875 *PS 424.025PS 424.03125 *PS 424.03750PS 424.04375 *PS 424.050PS 424.05625 *PS 424.06250PS 424.06875 *PS 424.075PS 424.08125 *PS 424.08750PS 424.09375 *PS 424.100PS 424.10625 *PS 424.11250PS 424.11875 *PS 424.125PS 424.13125 *PS 424.13750PS 424.14375 *PS 424.150PS 424.15625 *PS 424.16250PS 424.16875 *PS 424.175PS 424.18125 *PS 424.18750PS 424.19375 *PS 424.200PS 424.20625 *PS 424.21250PS 424.21875 *PS 424.225PS 424.23125 *PS 424.23750PS 424.24375 *PS 424.250PS 424.25625 *PS 424.26250PS 424.26875 *PS 424.275PS 424.28125 *PS 424.28750PS 424.29375 *PS 424.300PS 424.30625 *PS 424.31250PS 424.31875 *PS 424.325PS 424.33125 *PS 424.33750PS 424.34375 *PS 424.350PS 424.35625 *PS 424.36250PS 424.36875 *PS 424.375PS 424.38125 *PS 424.38750PS 424.39375 *PS 424.400IB 424.40625 *IB 424.41250IB 424.41875 *IB 424.425IB 424.43125 *IB 424.43750IB 424.44375 *IB 424.450IB 424.45625 *IB 424.46250IB 424.46875 *IB 424.475IB 424.48125 *IB 424.48750IB 424.49375 *IB 424.500IB 424.50625 *IB 424.51250IB 424.51875 *IB 424.525IB 424.53125 *IB 424.53750IB 424.54375 *IB 424.550IB 424.55625 *IB 424.56250IB 424.56875 *IB 424.575IB 424.58125 *IB 424.58750IB 424.59375 *IB 424.600IB 424.60625 *IB 424.61250IB 424.61875 *IB 424.625IB 424.63125 *IB 424.63750IB 424.64375 *IB 424.650IB 424.65625 *IB 424.66250IB 424.66875 *IB 424.675IB 424.68125 *IB 424.68750IB 424.69375 *IB 424.700IB 424.70625 *IB 424.71250IB 424.71875 *IB 424.725IB 424.73125 *IB 424.73750IB 424.74375 *IB 424.750IB 424.75625 *IB 424.76250IB 424.76875 *IB 424.775IB 424.78125 *IB 424.78750IB 424.79375 *IB 424.800IB 424.80625 *IB 424.81250IB 424.81875 *IB 424.825IB 424.83125 *IB 424.83750IB 424.84375 *IB 424.850IB 424.85625 *IB 424.86250IB 424.86875 *IB 424.875IB 424.88125 *IB 424.88750IB 424.89375 *IB 424.900IB 424.90625 *IB 424.91250IB 424.91875 *IB 424.925IB 424.93125 *IB 424.93750IB 424.94375 *IB 424.950IB 424.95625 *IB 424.96250IB 424.96875 *IB 424.975IB 424.98125 *IB 424.98750IB 424.99375 *IB Single channels: 425.000IB 425.00625 *IB 425.01250IB 425.01875 *IB 425.025IB 425.03125 *IB 425.03750IB 425.04375 *IB 425.050IB 425.05625 *IB 425.06250IB 425.06875 *IB 425.075IB 425.08125 *IB 425.08750IB 425.09375 *IB 425.100IB 425.10625 *IB 425.11250IB 425.11875 *IB 425.125IB 425.13125 *IB 425.13750IB 425.14375 *IB 425.150IB 425.15625 *IB 425.16250IB 425.16875 *IB 425.175IB 425.18125 *IB 425.18750IB 425.19375 *IB 425.200IB 425.20625 *IB 425.21250IB 425.21875 *IB 425.225IB 425.23125 *IB 425.23750IB 425.24375 *IB 425.250PS 425.25625 *PS 425.26250PS 425.26875 *PS 425.275PS 425.28125 *PS 425.28750PS 425.29375 *PS 425.300PS 425.30625 *PS 425.31250PS 425.31875 *PS 425.325PS 425.33125 *PS 425.33750PS 425.34375 *PS 425.350PS 425.35625 *PS 425.36250PS 425.36875 *PS 425.375PS 425.38125 *PS 425.38750PS 425.39375 *PS 425.400PS 425.40625 *PS 425.41250PS 425.41875 *PS 425.425PS 425.43125 *PS 425.43750PS 425.44375 *PS 425.450PS 425.45625 *PS 425.46250PS 425.46875 *PS 425.475PS 425.48125 *PS

* This frequency will be assigned with an authorized bandwidth not to exceed 6 kHz.

(b) [Reserved]

(c) Base or control stations shall be located within 48 km (30 miles) of the center of Buffalo or 80 km (50 miles) of the center of Detroit. In Cleveland, base or control stations will be allowed at locations north of line A that are within 48 km (30 miles) of the city center. In addition, low power (2 watts or less) base stations may locate within 80 km (50 miles) of the center of Buffalo. The following coordinates shall be used for the centers of these areas (coordinates are referenced to North American Datum 1983 (NAD83)):

Buffalo, NY42°52′52.2″ North latitude.
78°52′20.1″ West longitude. 		Cleveland, OH41°29′51.2″ North latitude.
81°41′49.5″ West longitude. 		Detroit, MI42°19′48.1″ North latitude.
83°02′56.7″ West longitude.

(d) Mobile operation shall be confined to within 80 km (50 miles) of the centers of Detroit, Cleveland, or Buffalo.

[52 FR 6156, Mar. 2, 1987, as amended at 54 FR 38681, Sept. 20, 1989; 58 FR 31476, June 3, 1993; 58 FR 44957, Aug. 25, 1993; 60 FR 37269, July 19, 1995; 61 FR 6576, Feb. 21, 1996; 62 FR 18929, Apr. 17, 1997; 63 FR 68965, Dec. 14, 1998]

AUTHORITY: 47 U.S.C. 154(i), 161, 303(g), 303(r), 332(c)(7), 1401-1473

SOURCE: 43 FR 54791, Nov. 22, 1978, unless otherwise noted.

CITE AS: 47 CFR 90.273