Sec. 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                          
  422.200.................................  IB                          
  422.20625 *.............................  IB                          
  422.21250...............................  IB                          
  422.21875 *.............................  IB                          
  422.225.................................  IB                          
  422.23125 *.............................  IB                          
  422.23750...............................  IB                          
  422.24375 *.............................  IB                          
  422.250.................................  IB                          
  422.25625 *.............................  IB                          
  422.26250...............................  IB                          
  422.26875 *.............................  IB                          
  422.275.................................  IB                          
  422.28125 *.............................  IB                          
  422.28750...............................  IB                          
  422.29375 *.............................  IB                          
  422.300.................................  IB                          
  422.30625 *.............................  IB                          
  422.31250...............................  IB                          
  422.31875 *.............................  IB                          
  422.325.................................  IB                          
  422.33125 *.............................  IB                          
  422.33750...............................  IB                          
  422.34375 *.............................  IB                          
  422.350.................................  IB                          
  422.35625 *.............................  IB                          
  422.36250...............................  IB                          
  422.36875 *.............................  IB                          
  422.375.................................  IB                          
  422.38125 *.............................  IB                          

[[Page 486]]

                                                                        
  422.38750...............................  IB                          
  422.39375 *.............................  IB                          
  422.400.................................  IB                          
  422.40625 *.............................  IB                          
  422.41250...............................  IB                          
  422.41875 *.............................  IB                          
  422.425.................................  IB                          
  422.43125 *.............................  IB                          
  422.43750...............................  IB                          
  422.44375 *.............................  IB                          
  422.450.................................  IB                          
  422.45625 *.............................  IB                          
  422.46250...............................  IB                          
  422.46875 *.............................  IB                          
  422.475.................................  IB                          
  422.48125 *.............................  IB                          
  422.48750...............................  IB                          
  422.49375 *.............................  IB                          
  422.500.................................  IB                          
  422.50625 *.............................  IB                          
  422.51250...............................  IB                          
  422.51875 *.............................  IB                          
  422.525.................................  IB                          
  422.53125 *.............................  IB                          
  422.53750...............................  IB                          
  422.54375 *.............................  IB                          
  422.550.................................  IB                          
  422.55625 *.............................  IB                          
  422.56250...............................  IB                          
  422.56875 *.............................  IB                          
  422.575.................................  IB                          
  422.58125 *.............................  IB                          
  422.58750...............................  IB                          
  422.59375 *.............................  IB                          
  422.600.................................  IB                          
  422.60625 *.............................  IB                          
  422.61250...............................  IB                          
  422.61875 *.............................  IB                          
  422.625.................................  IB                          
  422.63125 *.............................  IB                          
  422.63750...............................  IB                          
  422.64375 *.............................  IB                          
  422.650.................................  IB                          
  422.65625 *.............................  IB                          
  422.66250...............................  IB                          
  422.66875 *.............................  IB                          
  422.675.................................  IB                          
  422.68125 *.............................  IB                          
  422.68750...............................  IB                          
  422.69375 *.............................  IB                          
  422.700.................................  IB                          
  422.70625 *.............................  IB                          
  422.71250...............................  IB                          
  422.71875 *.............................  IB                          
  422.725.................................  IB                          
  422.73125 *.............................  IB                          
  422.73750...............................  IB                          
  422.74375 *.............................  IB                          
  422.750.................................  IB                          
  422.75625 *.............................  IB                          
  422.76250...............................  IB                          
  422.76875 *.............................  IB                          
  422.775.................................  IB                          
  422.78125 *.............................  IB                          
  422.78750...............................  IB                          
  422.79375 *.............................  IB                          
  422.800.................................  IB                          
  422.80625 *.............................  IB                          
  422.81250...............................  IB                          
  422.81875 *.............................  IB                          
  422.825.................................  IB                          
  422.83125 *.............................  IB                          
  422.83750...............................  IB                          
  422.84375 *.............................  IB                          
  422.850.................................  IB                          
  422.85625 *.............................  IB                          
  422.86250...............................  IB                          
  422.86875 *.............................  IB                          
  422.875.................................  IB                          
  422.88125 *.............................  IB                          
  422.88750...............................  IB                          
  422.89375 *.............................  IB                          
  422.900.................................  IB                          
  422.90625 *.............................  IB                          
  422.91250...............................  IB                          
  422.91875 *.............................  IB                          
  422.925.................................  IB                          
  422.93125 *.............................  IB                          
  422.93750...............................  IB                          
  422.94375 *.............................  IB                          
  422.950.................................  IB                          
  422.95625 *.............................  IB                          
  422.96250...............................  IB                          
  422.96875 *.............................  IB                          
  422.975.................................  IB                          
  422.98125 *.............................  IB                          
  422.98750...............................  IB                          
  422.99375 *.............................  IB                          
  423.000.................................  PS                          
  423.00625 *.............................  PS                          
  423.01250...............................  PS                          
  423.01875 *.............................  PS                          
  423.025.................................  PS                          
  423.03125 *.............................  PS                          
  423.03750...............................  PS                          
  423.04375 *.............................  PS                          
  423.050.................................  PS                          
  423.05625 *.............................  PS                          
  423.06250...............................  PS                          
  423.06875 *.............................  PS                          
  423.075.................................  PS                          
  423.08125 *.............................  PS                          
  423.08750...............................  PS                          
  423.09375 *.............................  PS                          
  423.100.................................  PS                          
  423.10625 *.............................  PS                          
  423.11250...............................  PS                          
  423.11875 *.............................  PS                          
  423.125.................................  PS                          
  423.13125 *.............................  PS                          
  423.13750...............................  PS                          
  423.14375 *.............................  PS                          
  423.150.................................  PS                          
  423.15625 *.............................  PS                          
  423.16250...............................  PS                          
  423.16875 *.............................  PS                          
  423.175.................................  PS                          
  423.18125 *.............................  PS                          
  423.18750...............................  PS                          
  423.19375 *.............................  PS                          
  423.200.................................  PS                          
  423.20625 *.............................  PS                          
  423.21250...............................  PS                          
  423.21875 *.............................  PS                          
  423.225.................................  PS                          
  423.23125 *.............................  PS                          
  423.23750...............................  PS                          
  423.24375 *.............................  PS                          
  423.250.................................  PS                          
  423.25625 *.............................  PS                          

[[Page 487]]

                                                                        
  423.26250...............................  PS                          
  423.26875 *.............................  PS                          
  423.275.................................  PS                          
  423.28125 *.............................  PS                          
  423.28750...............................  PS                          
  423.29375 *.............................  PS                          
  423.300.................................  PS                          
  423.30625 *.............................  PS                          
  423.31250...............................  PS                          
  423.31875 *.............................  PS                          
  423.325.................................  PS                          
  423.33125 *.............................  PS                          
  423.33750...............................  PS                          
  423.34375 *.............................  PS                          
  423.350.................................  PS                          
  423.35625 *.............................  PS                          
  423.36250...............................  PS                          
  423.36875 *.............................  PS                          
  423.375.................................  PS                          
  423.38125 *.............................  PS                          
  423.38750...............................  PS                          
  423.39375 *.............................  PS                          
  423.400.................................  PS                          
  423.40625 *.............................  PS                          
  423.41250...............................  PS                          
  423.41875 *.............................  PS                          
  423.425.................................  PS                          
  423.43125 *.............................  PS                          
  423.43750...............................  PS                          
  423.44375 *.............................  PS                          
  423.450.................................  PS                          
  423.45625 *.............................  PS                          
  423.46250...............................  PS                          
  423.46875 *.............................  PS                          
  423.475.................................  PS                          
  423.48125 *.............................  PS                          
  423.48750...............................  PS                          
  423.49375 *.............................  PS                          
  423.500.................................  PS                          
  423.50625 *.............................  PS                          
  423.51250...............................  PS                          
  423.51875 *.............................  PS                          
  423.525.................................  PS                          
  423.53125 *.............................  PS                          
  423.53750...............................  PS                          
  423.54375 *.............................  PS                          
  423.550.................................  PS                          
  423.55625 *.............................  PS                          
  423.56250...............................  PS                          
  423.56875 *.............................  PS                          
  423.575.................................  PS                          
  423.58125 *.............................  PS                          
  423.58750...............................  PS                          
  423.59375 *.............................  PS                          
  423.600.................................  PS                          
  423.60625 *.............................  PS                          
  423.61250...............................  PS                          
  423.61875 *.............................  PS                          
  423.625.................................  PS                          
  423.63125 *.............................  PS                          
  423.63750...............................  PS                          
  423.64375 *.............................  PS                          
  423.650.................................  PS                          
  423.65625 *.............................  PS                          
  423.66250...............................  PS                          
  423.66875 *.............................  PS                          
  423.675.................................  PS                          
  423.68125 *.............................  PS                          
  423.68750...............................  PS                          
  423.69375 *.............................  PS                          
  423.700.................................  PS                          
  423.70625 *.............................  PS                          
  423.71250...............................  PS                          
  423.71875 *.............................  PS                          
  423.725.................................  PS                          
  423.73125 *.............................  PS                          
  423.73750...............................  PS                          
  423.74375 *.............................  PS                          
  423.750.................................  PS                          
  423.75625 *.............................  PS                          
  423.76250...............................  PS                          
  423.76875 *.............................  PS                          
  423.775.................................  PS                          
  423.78125 *.............................  PS                          
  423.78750...............................  PS                          
  423.79375 *.............................  PS                          
  423.800.................................  PS                          
  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                           
  423.825................................  PS                           
  423.83125 *............................  PS                           
  423.83750..............................  PS                           
  423.84375 *............................  PS                           
  423.850................................  PS                           
  423.85625 *............................  PS                           
  423.86250..............................  PS                           
  423.86875 *............................  PS                           
  423.875................................  PS                           
  423.88125 *............................  PS                           
  423.88750..............................  PS                           
  423.89375 *............................  PS                           
  423.900................................  PS                           
  423.90625 *............................  PS                           
  423.91250..............................  PS                           
  423.91875 *............................  PS                           
  423.925................................  PS                           
  423.93125 *............................  PS                           
  423.93750..............................  PS                           
  423.94375 *............................  PS                           
  423.950................................  PS                           
  423.95625 *............................  PS                           
  423.96250..............................  PS                           
  423.96875 *............................  PS                           
  423.975................................  PS                           
  423.98125 *............................  PS                           
  423.98750..............................  PS                           
  423.99375 *............................  PS                           
  424.000................................  PS                           
  424.00625 *............................  PS                           
  424.01250..............................  PS                           
  424.01875 *............................  PS                           
  424.025................................  PS                           
  424.03125 *............................  PS                           
  424.03750..............................  PS                           
  424.04375 *............................  PS                           
  424.050................................  PS                           
  424.05625 *............................  PS                           
  424.06250..............................  PS                           
  424.06875 *............................  PS                           

[[Page 488]]

                                                                        
  424.075................................  PS                           
  424.08125 *............................  PS                           
  424.08750..............................  PS                           
  424.09375 *............................  PS                           
  424.100................................  PS                           
  424.10625 *............................  PS                           
  424.11250..............................  PS                           
  424.11875 *............................  PS                           
  424.125................................  PS                           
  424.13125 *............................  PS                           
  424.13750..............................  PS                           
  424.14375 *............................  PS                           
  424.150................................  PS                           
  424.15625 *............................  PS                           
  424.16250..............................  PS                           
  424.16875 *............................  PS                           
  424.175................................  PS                           
  424.18125 *............................  PS                           
  424.18750..............................  PS                           
  424.19375 *............................  PS                           
  424.200................................  PS                           
  424.20625 *............................  PS                           
  424.21250..............................  PS                           
  424.21875 *............................  PS                           
  424.225................................  PS                           
  424.23125 *............................  PS                           
  424.23750..............................  PS                           
  424.24375 *............................  PS                           
  424.250................................  PS                           
  424.25625 *............................  PS                           
  424.26250..............................  PS                           
  424.26875 *............................  PS                           
  424.275................................  PS                           
  424.28125 *............................  PS                           
  424.28750..............................  PS                           
  424.29375 *............................  PS                           
  424.300................................  PS                           
  424.30625 *............................  PS                           
  424.31250..............................  PS                           
  424.31875 *............................  PS                           
  424.325................................  PS                           
  424.33125 *............................  PS                           
  424.33750..............................  PS                           
  424.34375 *............................  PS                           
  424.350................................  PS                           
  424.35625 *............................  PS                           
  424.36250..............................  PS                           
  424.36875 *............................  PS                           
  424.375................................  PS                           
  424.38125 *............................  PS                           
  424.38750..............................  PS                           
  424.39375 *............................  PS                           
  424.400................................  IB                           
  424.40625 *............................  IB                           
  424.41250..............................  IB                           
  424.41875 *............................  IB                           
  424.425................................  IB                           
  424.43125 *............................  IB                           
  424.43750..............................  IB                           
  424.44375 *............................  IB                           
  424.450................................  IB                           
  424.45625 *............................  IB                           
  424.46250..............................  IB                           
  424.46875 *............................  IB                           
  424.475................................  IB                           
  424.48125 *............................  IB                           
  424.48750..............................  IB                           
  424.49375 *............................  IB                           
  424.500................................  IB                           
  424.50625 *............................  IB                           
  424.51250..............................  IB                           
  424.51875 *............................  IB                           
  424.525................................  IB                           
  424.53125 *............................  IB                           
  424.53750..............................  IB                           
  424.54375 *............................  IB                           
  424.550................................  IB                           
  424.55625 *............................  IB                           
  424.56250..............................  IB                           
  424.56875 *............................  IB                           
  424.575................................  IB                           
  424.58125 *............................  IB                           
  424.58750..............................  IB                           
  424.59375 *............................  IB                           
  424.600................................  IB                           
  424.60625 *............................  IB                           
  424.61250..............................  IB                           
  424.61875 *............................  IB                           
  424.625................................  IB                           
  424.63125 *............................  IB                           
  424.63750..............................  IB                           
  424.64375 *............................  IB                           
  424.650................................  IB                           
  424.65625 *............................  IB                           
  424.66250..............................  IB                           
  424.66875 *............................  IB                           
  424.675................................  IB                           
  424.68125 *............................  IB                           
  424.68750..............................  IB                           
  424.69375 *............................  IB                           
  424.700................................  IB                           
  424.70625 *............................  IB                           
  424.71250..............................  IB                           
  424.71875 *............................  IB                           
  424.725................................  IB                           
  424.73125 *............................  IB                           
  424.73750..............................  IB                           
  424.74375 *............................  IB                           
  424.750................................  IB                           
  424.75625 *............................  IB                           
  424.76250..............................  IB                           
  424.76875 *............................  IB                           
  424.775................................  IB                           
  424.78125 *............................  IB                           
  424.78750..............................  IB                           
  424.79375 *............................  IB                           
  424.800................................  IB                           
  424.80625 *............................  IB                           
  424.81250..............................  IB                           
  424.81875 *............................  IB                           
  424.825................................  IB                           
  424.83125 *............................  IB                           
  424.83750..............................  IB                           
  424.84375 *............................  IB                           
  424.850................................  IB                           
  424.85625 *............................  IB                           
  424.86250..............................  IB                           
  424.86875 *............................  IB                           
  424.875................................  IB                           
  424.88125 *............................  IB                           
  424.88750..............................  IB                           
  424.89375 *............................  IB                           
  424.900................................  IB                           
  424.90625 *............................  IB                           
  424.91250..............................  IB                           
  424.91875 *............................  IB                           
  424.925................................  IB                           
  424.93125 *............................  IB                           
  424.93750..............................  IB                           
  424.94375 *............................  IB                           

[[Page 489]]

                                                                        
  424.950................................  IB                           
  424.95625 *............................  IB                           
  424.96250..............................  IB                           
  424.96875 *............................  IB                           
  424.975................................  IB                           
  424.98125 *............................  IB                           
  424.98750..............................  IB                           
  424.99375 *............................  IB                           
Single channels:                                                        
  425.000................................  IB                           
  425.00625 *............................  IB                           
  425.01250..............................  IB                           
  425.01875 *............................  IB                           
  425.025................................  IB                           
  425.03125 *............................  IB                           
  425.03750..............................  IB                           
  425.04375 *............................  IB                           
  425.050................................  IB                           
  425.05625 *............................  IB                           
  425.06250..............................  IB                           
  425.06875 *............................  IB                           
  425.075................................  IB                           
  425.08125 *............................  IB                           
  425.08750..............................  IB                           
  425.09375 *............................  IB                           
  425.100................................  IB                           
  425.10625 *............................  IB                           
  425.11250..............................  IB                           
  425.11875 *............................  IB                           
  425.125................................  IB                           
  425.13125 *............................  IB                           
  425.13750..............................  IB                           
  425.14375 *............................  IB                           
  425.150................................  IB                           
  425.15625 *............................  IB                           
  425.16250..............................  IB                           
  425.16875 *............................  IB                           
  425.175................................  IB                           
  425.18125 *............................  IB                           
  425.18750..............................  IB                           
  425.19375 *............................  IB                           
  425.200................................  IB                           
  425.20625 *............................  IB                           
  425.21250..............................  IB                           
  425.21875 *............................  IB                           
  425.225................................  IB                           
  425.23125 *............................  IB                           
  425.23750..............................  IB                           
  425.24375 *............................  IB                           
  425.250................................  PS                           
  425.25625 *............................  PS                           
  425.26250..............................  PS                           
  425.26875 *............................  PS                           
  425.275................................  PS                           
  425.28125 *............................  PS                           
  425.28750..............................  PS                           
  425.29375 *............................  PS                           
  425.300................................  PS                           
  425.30625 *............................  PS                           
  425.31250..............................  PS                           
  425.31875 *............................  PS                           
  425.325................................  PS                           
  425.33125 *............................  PS                           
  425.33750..............................  PS                           
  425.34375 *............................  PS                           
  425.350................................  PS                           
  425.35625 *............................  PS                           
  425.36250..............................  PS                           
  425.36875 *............................  PS                           
  425.375................................  PS                           
  425.38125 *............................  PS                           
  425.38750..............................  PS                           
  425.39375 *............................  PS                           
  425.400................................  PS                           
  425.40625 *............................  PS                           
  425.41250..............................  PS                           
  425.41875 *............................  PS                           
  425.425................................  PS                           
  425.43125 *............................  PS                           
  425.43750..............................  PS                           
  425.44375 *............................  PS                           
  425.450................................  PS                           
  425.45625 *............................  PS                           
  425.46250..............................  PS                           
  425.46875 *............................  PS                           
  425.475................................  PS                           
  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:

                                                                        
                                                                        
                                                                        
Buffalo, NY............................  425252 North latitude.         
                                         785221 West longitude.         
Cleveland, OH..........................  412951 North latitude.         
                                         814150 West longitude.         
Detroit, MI............................  421948 North latitude.         
                                         830257 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]

    Effective Date Note: At  62 FR 18929 , Apr. 17, 1997, Sec. 90.273 was 
amended by revising the first two sentences and Tables 1 and 2 of 
paragraph (a) and removing and reserving paragraph (b), effective Oct. 
17, 1997.