Sec.  90.619   Operations within the U.S./Mexico and U.S./Canada border areas.

   (a) Use of Frequencies in 800 MHz Band in Mexico Border Region. All
   operations in the 806–824/851–869 MHz band within 110 km (68.4 miles) of the
   U.S./Mexico border (“Mexico border region”) shall be in accordance with
   international agreements between the U.S. and Mexico. Channels 231–710 are
   offset 12.5 kHz lower in frequency than those specified in the table in
    Sec. 90.613. Stations located on Mt. Lemmon, serving the Tucson, AZ area, will
   only be authorized offset frequencies.

   (b) Use of Frequencies in 900 MHz Band in Mexico Border Region. All
   operations in the 896–901/935–940 MHz band within the Mexico border region
   shall be in accordance with international agreements between the U.S. and
   Mexico.

   (1) The channels listed in Table 1 below are available to applicants
   eligible in the Industrial/Business Pool of subpart C of this part but
   exclude Special Mobilized Radio Systems as defined in  Sec. 90.603(c). These
   frequencies are available within the Mexico border region. Specialized
   Mobile Radio (SMR) systems will not be authorized on these frequencies.

   For multi-channel systems, channels may be grouped vertically or
   horizontally as they appear in the following table. Channels numbered above
   200 may be used only subject to the power flux density limits stated in
   paragraph (a)(2) of this section:

   Table 1_United States/Mexico Border Area, Business/Industrial/Land
              Transportation Pool 896-901/935-940 MHz Band
                             [199 Channels]
------------------------------------------------------------------------

------------------------------------------------------------------------
                              Channel Nos.
------------------------------------------------------------------------
11-12-13-14-15                       131-132-133-134-135
16-17-18-19-20                       136-137-138-139-140
31-32-33-34-35                       231-232-233-234-235
36-37-38-39-40                       236-237-238-239-240
51-52-53-54-55                       171-172-173-174-175
56-57-58-59-60                       176-177-178-179-180
71-72-74-75                          271-272-273-274-275
76-77-78-79-80                       276-277-278-279-280
91-92-93-94-95                       211-212-213-214-215
96-97-98-99-100                      216-217-218-219-220
111-112-113-114-115                  311-312-313-314-315
116-117-118-119-120                  316-317-318-319-320
151-152-153-154-155                  351-352-353-354-355
156-157-158-159-160                  356-357-358-359-360
191-192-193-194-195                  391-392-393-394-395
196-197-198-199-200                  396-397-398-399
251-252-253-254-255                  331-332-333-334-335
256-257-258-259-260                  336-337-338-339-340
291-292-293-294-295                  371-372-373-374-375
296-297-298-299-300                  376-377-378-379-380
------------------------------------------------------------------------

   (2) The channels listed in Table 2 of this section are available for
   operations only to eligibles in the SMR category—which consists of
   Specialized Mobile Radio (SMR) stations and eligible end users. These
   frequencies are available in the Mexico border region. The spectrum blocks
   listed in the table below are available for EA-based services according to
    Sec. 90.681.

 Table 2_United States-Mexico Border Area, SMR Category 896-901/935-940
                                MHz Band
                             [200 Channels]
------------------------------------------------------------------------
             Block                             Channel Nos.
------------------------------------------------------------------------
A..............................  1-2-3-4-5-6-7-8-9-10
B..............................  21-22-23-24-25-26-27-28-29-30
C..............................  41-42-43-44-45-46-47-48-49-50
D..............................  61-62-63-64-65-66-67-68-69-70
E..............................  81-82-83-84-85-86-87-88-89-90
F..............................  101-102-103-104-105-106-107-108-109-110
G..............................  121-122-123-124-125-126-127-128-129-130
H..............................  141-142-143-144-145-146-147-148-149-150
I..............................  161-162-163-164-165-166-167-168-169-170
J..............................  181-182-183-184-185-186-187-188-189-190
K..............................  201-202-203-204-205-206-207-208-209-210
L..............................  221-222-223-224-225-226-227-228-229-230
M..............................  241-242-243-244-245-246-247-248-249-250
N..............................  261-262-263-264-265-266-267-268-269-270
O..............................  281-282-283-284-285-286-287-288-289-290
P..............................  301-302-303-304-305-306-307-308-309-310
Q..............................  321-322-323-324-325-326-327-328-329-330
R..............................  341-342-343-344-345-346-347-348-349-350
S..............................  361-362-363-364-365-366-367-368-369-370
T..............................  381-382-383-384-385-386-387-388-389-390

------------------------------------------------------------------------
Channels numbered above 200 may only be used subject to the power flux
  density limits at or beyond the Mexico border as stated in paragraph
  (4) of this section.

   (3) The specific channels that are available for licensing in the band
   896–901/935–940 MHz within the Mexico border region are subject to Effective
   Radiated Power (ERP) and Antenna Height limitations as indicated in Table 3
   below.

    Table 3_Limits of Effective Radiated Power (ERP) Corresponding to
Antenna Heights of Base Stations in the 896-901/935-940 MHz Bands Within
            110 Kilometers (68.4 Miles) of the Mexican Border
------------------------------------------------------------------------
            Antenna height above mean sea level                 ERP in
------------------------------------------------------------    watts
                    Meters                          Feet      (maximum)
------------------------------------------------------------------------
0-503.........................................       0-1650          500
504-609.......................................    1651-2000          350
610-762.......................................    2001-2500          200
764-914.......................................    2501-3000          140
915-1066......................................    3001-3500          100
1067-1219.....................................    3501-4000           75
1220-1371.....................................    4000-4500           70
1372-1523.....................................    4501-5000           65
Above 1523....................................   Above 5000            5
------------------------------------------------------------------------

   (4) All channels in the 896–901/935–940 MHz band are available for
   assignment to U.S. stations within the Mexico border region if the maximum
   power flux density (pfd) of the station's transmitted signal at any point at
   or beyond the border does not exceed −107 dB (W/m ^2 ). The spreading loss
   must be calculated using the free space formula taking into account any
   antenna discrimination in the direction of the border. Authorizations for
   stations using channels allotted to Mexico on a primary basis will be
   secondary to Mexican operations and conditioned to require that licensees
   take immediate action to eliminate any harmful interference resulting from
   the station's transmitted signal exceeding −107 dB (W/m ^2 ).

   (c) Use of 800 MHz Band in Canada Border Region. All operations in the
   806–824/851–869 MHz band within 140 km (87 miles) of the U.S./Canada border
   (“Canada border region”) shall be in accordance with international
   agreements between the U.S. and Canada.

   (d) Use of 900 MHz Band in Canada Border Region. All operations in the
   896–901/935–940 MHz band within the Canada border region shall be in
   accordance with international agreements between the U.S. and Canada. The
   following criteria shall govern the assignment of frequency pairs (channels)
   in the 896–901/935–940 MHz band for stations located in the U.S./Canada
   border area. They are available for assignments for conventional or trunked
   systems in accordance with applicable sections of this subpart.

   (1) Channels 1–399, as listed in  Sec. 90.613 table of 896–901/935–940 MHz
   Channel Designations, are available to eligible applicants for use in the
   U.S./Canada border area as shown in table 27. Additionally, Channels 71, 75,
   79, 151, 155, and 159 are available in all regions only for implementation
   of an Advanced Train Control System as defined in 3 FCC Rcd 427 (1988)
   (Advanced Train Control Waiver).

 Table 27_Channels in the 896-901/935-940 MHz Frequency Bands Available
                     in the U.S./Canada Border Area
------------------------------------------------------------------------
         Region                   Location (longitude)          Channels
------------------------------------------------------------------------
1......................  66 ° W-71 ° W. (0-100 km from      1-200,
                          border).                              398, 399
2......................  71 ° W-80 °30[min] W (0-100 km      1-120
                          from border).
3......................  80 °30[min] W-85 ° W (0-100 km      1-340
                          from border).
4......................  85 ° W-121 °30[min] W (0-100 km    1-200,
                          from border).                         398, 399
5......................  121 °30[min] W-127 ° W (0-140      1-200,
                          km from border).                      398, 399
6......................  127 ° W-143 ° W (0-100 km from     1-200,
                          border).                              398, 399
7......................  66 ° W-121 °30[min] W (100-140      1-399
                          km from border).
8......................  127 ° W-143 ° W (100-140 km         1-399
                          from border).
------------------------------------------------------------------------
Note: For assignments in the 896-901/935-940 MHz bands, the cities of
  Akron, Ohio (41 °05[min]00[sec] N, 81 °30[min]40[sec] W) and
  Youngstown, Ohio (41 °05[min]57[sec] N, 80 °39[min]02[sec] W)
  are considered outside of Region 3, and Syracuse, New York
  (43 °03[min]04[sec] N, 76 °09[min]14[sec] W) is considered
  outside of Region 2. These cities are defined as an area with the
  given center coordinates and encompassing a circle of 30 km radius.

   (2) All frequency assignments made pursuant to paragraph (d)(1) of this
   section shall comply with the requirements of  Sec. 90.619(b).

   (3) In Region 5, Channels 201–397 may be authorized in the United States
   under the following conditions:

   (i) An assignment may be made if the predicted power flux density (PFD) of a
   proposed station's signal does not exceed –107 dBW/m ^2 at the border. The
   prediction of the PFD is calculated based upon a modified Longley-Rice
   point-to-point propagation model with time and location variabilities of 10
   percent ^3 and 3-second digitized terrain date ^4 .

   ^3 See note 1, paragraph (c) of this section.

   ^4 See note 2, paragraph (c) of this section.

   (ii) Authorizations for Channels 201–397 in Region 5 are secondary to
   Canadian operations and conditioned to require that licensees take immediate
   action to eliminate any harmful interference resulting from the station's
   transmitted signal exceeding –107 dBW/m ^2 at or beyond the U.S./Canada
   border.

   (4) Channel assignments for stations to be located in the geographical area
   in Region 1 enclosed by the United States-Canada border, the meridian 71 ° W
   and the line beginning at the intersection of 44 °25' N, 71 ° W, then running
   by great circle arc to the intersection of 45 ° N, 70 ° W, then North along
   meridian 70 ° W to the intersection of 45 °45' N, then running West along
   45 °45' N to the intersection of the United States-Canada border, will be
   only for channels 121 through 160, inclusive, and will be limited to
   assignments with 11 kHz or less necessary bandwidth. Coordination with
   Canada will be required for these channels.

   (5) Channel assignments for stations to be located in the geographical area
   in Region 3 enclosed by the meridian of 81 ° W longitude, the arc of a circle
   of 100 km radius centered at 42 °39'30" N latitude and 81 ° W longitude at the
   northern shore of Lake Erie and drawn clockwise from the southerly
   intersection with 80 °30' W longitude to intersect the United States-Canada
   border West of 81 ° W, and the United States-Canada border, will be only for
   channels 121 through 230, inclusive, and will be limited to assignments with
   11 kHz or less necessary bandwidth. Coordination with Canada will be
   required for these channels. U.S. stations must protect Canadian stations
   operating on channels 121 through 230 within an area of 30 km radius from
   the center city coordinates (referenced to North American Datum 1983
   (NAD83)) of London, Ontario (42 °59'00.1" N, 81 °13'59.5" W).

   (6) Additional channels available—The channels listed in table 28 are
   available for assignment in Regions 1–6 if the maximum power flux density
   (PFD) of the station's transmitted signal does not exceed the limits
   specified in tables 29 and 30. The spreading loss shall be calculated using
   the free space formula taking into account any antenna discrimination in the
   direction of the border.

                 Table 28_Additional Channels Available
                              [Regions 1-6]
------------------------------------------------------------------------
                                     Channel
              Region                  No.'s     Effective radiated power
------------------------------------------------------------------------
1................................     201-397  See Table 29
2................................     121-399  See Table 29
3................................     341-399  See Table 29
4................................     201-397  See Table 29
5................................     201-397  See Table 30
6................................     201-397  See Table 29
------------------------------------------------------------------------

   Authorizations for stations using these channels will be secondary to
   Canadian operations and conditioned to require that licensees take immediate
   action to eliminate any harmful interference resulting from the station's
   transmitted signal exceeding the values specified in tables 29 or 30 at or
   beyond the U.S./Canada border.

   Table 29_Maximum Power Flux Density (PFD) at the U.S./Canada Border
                Corresponding to Effective Antenna Height
                       [Regions 1, 2, 3, 4, and 6]
------------------------------------------------------------------------
              Effective antenna height (EAH)
-----------------------------------------------------------  PFD (dBW/m
                Feet                         Meters             \2\)
------------------------------------------------------------------------
0-500..............................  0-152................           -84
501-1000...........................  153-305..............           -90
1001-1500..........................  306-457..............           -95
1501-2000..........................  458-609..............           -98
2001-2500..........................  610-762..............          -101
2501-3000..........................  763-914..............          -101
3001-3500..........................  915-1066.............          -103
3501-4000..........................  1067-1219............          -104
Above 4000.........................  Above 1219...........          -104
------------------------------------------------------------------------

   Table 30_Maximum Power Flux Density (PFD) at the U.S./Canada Border
          Corresponding to Antenna Height Above Mean Sea Level
                               [Region 5]
------------------------------------------------------------------------
            Antenna height above mean sea level
-----------------------------------------------------------  PFD (dBW/m
                Feet                         Meters             \2\)
------------------------------------------------------------------------
0-1650.............................  0-503................         -87.0
1651-2000..........................  504-609..............         -88.5
2001-2500..........................  610-762..............         -91.0
2501-3000..........................  763-914..............         -92.5
3001-3500..........................  915-1066.............         -94.0
3501-4000..........................  1067-1219............         -95.0
4001-4500..........................  1220-1371............         -95.5
4501-5000..........................  1372-1523............         -96.0
Above 5000.........................  Above 1523...........        -107.0
------------------------------------------------------------------------

   (Secs. 4(i) and 303, Communications Act, as amended, and 5 U.S.C. 553
   (b)(3)(B) and (d)(1))

   [ 47 FR 41032 , Sept. 16, 1982;  47 FR 41045 , Sept. 16, 1982;  47 FR 51883 , Nov.
   18, 1982, as amended at  48 FR 51928 , Nov. 15, 1983;  49 FR 22094 , May 25,
   1984;  50 FR 12261 , Mar. 28, 1985;  52 FR 3662 , Feb. 5, 1987;  55 FR 42571 ,
   Oct. 22, 1990;  56 FR 41469 , Aug. 21, 1991;  57 FR 55146 , Nov. 24, 1992;  58 FR 31476 , June 3, 1993;  58 FR 44963 , Aug. 25, 1993;  59 FR 31558 , June 20, 1994;
    60 FR 48918 , Sept. 21, 1995;  61 FR 6156 , Feb. 16, 1996;  61 FR 6577 , Feb. 21,
   1996;  62 FR 18935 , Apr. 17, 1997;  62 FR 41214 , July 31, 1997;  63 FR 68968 ,
   Dec. 14, 1998;  64 FR 71054 , Dec. 20, 1999;  69 FR 67846 , Nov. 22, 2004;  70 FR 76711 , Dec. 28, 2005]