§  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 § 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 § 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 § 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
   (maximum)
   Meters Feet
   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 (“U.S./Canada border area”) shall be in accordance with
   international agreements between the U.S. and Canada.

   (1) The U.S./Canada border area is divided into the following
   geographical regions (“Canada Border Regions”). U.S. primary channels
   are shown in the table by region. The remaining channels are primary to
   Canada (“Canada Primary channels”).

   Table C1—Geographical Regions
   Region Location (longitude) U.S. primary channels
   1 66�° W–71�° W (0–100 km from border) 1–260, 561–710, 772–790 and
   792–830.
   2 71�° W–80�°30' W (0–100 km from border) 1–170, 621–710 and 795–830.
   3 80�°30' W–85�° W (0–100 km from border) 1–320, 501–710, 729–730,
   732–750, 752–770, 772–790 and 792–830.
   4 85�° W–121�°30' W (0–100 km from border) 1–260, 561–710, 772–790 and
   792–830.
   5 121�°30' W–127�° W (0–140 km from border) 1–260, 561–710, 772–790 and
   792–830.
   6 127�° W–143�° W (0–100 km from border) 1–260, 561–710, 772–790 and
   792–830.
   7A 66�° W–71�° W (100–140 km from border) 1–830.
   7A 80�°30' W–121�°30' W (100–140 km from border) 1–830.
   7B 71�° W–80�°30' W (100–140 km from border) 1–830.
   8 127�° W–143�° W (100–140 km from border) 1–830.

   (2) Stations authorized on U.S. primary channels in all Canada Border
   Regions, except Region 5, will be subject to the Effective Radiated
   Power (ERP) and Effective Antenna Height (EAH) limitations listed in
   Table C2. The Effective Antenna Height is calculated by subtracting the
   Assumed Average Terrain Elevation (AATE) listed in Table C3 from the
   antenna height above mean sea level.

   Table C2—Limits of Effective Radiated Power (ERP) Corresponding to
   Effective Antenna Heights (EAH) for Regions 1, 2, 3, 4, 6, 7 and 8
   Effective Antenna Height (EAH) ERP watts
   (maximum)
   Metres Feet
   0–152 0–500 500
   153–305 501–1000 125
   306–457 1001–1500 40
   458–609 1501–2000 20
   610–914 2001–3000 10
   915–1066 3001–3500 6
   Above 1967 Above 3501 5

   Table C3—Assumed Average Terrain Elevation (AATE) Along the U.S.-Canada
   Border
   Longitude (Φ)
   (�°West) Latitude (Ω)
   (�°North)                      Assumed average terrain elevation
           United States           Canada
        Feet           Metres    Feet Metres
   65 ≤ Φ < 69     Ω < 45           0      0   0    0
   ”               45 ≤ Ω < 46    300     91 300   91
   ”               Ω ≥ 46        1000    305 1000  305
   69 ≤ Φ < 73     All           2000    609 1000  305
   73 ≤ Φ < 74     ”              500    152 500  152
   74 ≤ Φ < 78     ”              250     76 250   76
   78 ≤ Φ < 80     Ω < 43         250     76 250   76
   ”               Ω ≥ 43         500    152 500  152
   80 ≤ Φ < 90     All            600    183 600  183
   90 ≤ Φ < 98     ”             1000    305 1000  305
   98 ≤ Φ < 102    ”             1500    457 1500  457
   102 ≤ Φ < 108   ”             2500    762 2500  762
   108 ≤ Φ < 111   ”             3500   1066 3500 1066
   111 ≤ Φ < 113   ”             4000   1219 3500 1066
   113 ≤ Φ < 114   ”             5000   1524 4000 1219
   114 ≤ Φ < 121.5 ”             3000    914 3000  914
   121.5 ≤ Φ < 127 ”                0      0   0    0
   Φ ≥ 127         54 ≤ Ω < 56      0      0   0    0
   ”               56 ≤ Ω < 58    500    152 1500  457
   ”               58 ≤ Ω < 60      0      0 2000  609
   ”               60 ≤ Ω < 62   4000   1219 2500  762
   ”               62 ≤ Ω < 64   1600    488 1600  488
   ”               64 ≤ Ω < 66   1000    305 2000  609
   ”               66 ≤ Ω < 68    750    228 750  228
   ”               68 ≤ Ω < 69.5 1500    457 500  152
   ”               Ω ≥ 69.5         0      0   0    0

   (3) Stations authorized on U.S. primary channels in Canada Border
   Region 5 will be subject to the Effective Radiated Power (ERP) and
   Antenna Height Above Mean Sea Level limitations listed in Table C4.

   Table C4—Limits of Effective Radiated Power (ERP) Corresponding to
   Antenna Height Above Mean Sea Level for Region 5
   Antenna Height Above Mean Sea Level ERP Watts
   (maximum)
   Metres Feet
   0–503 0–1650 500
   504–609 1651–2000 350
   610–762 2001–2500 200
   763–914 2501–3000 140
   915–1066 3001–3500 100
   1067–1219 3501–4000 75
   1220–1371 4001–4500 70
   1372–1523 4501–5000 65
   Above 1523 Above 5000 5

   (4) Stations may be authorized on Canada Primary channels in the Canada
   Border Regions provided the maximum power flux density (PFD) per 25 kHz
   at or beyond the border does not exceed −107 dB(W/m2). Stations
   authorized on Canada Primary channels will be secondary to stations in
   Canada unless otherwise specified in an international agreement between
   the U.S. and Canada.

   (5) Stations authorized to operate within 30 kilometers of the center
   city coordinates listed in Table C5 are considered to fall outside of
   the U.S./Canada border area and may operate according to the non-border
   band plan listed in § 90.617.

   Table C5—Cities That Are Considered To Fall Within Candian Border
   Region 7
        Location              Coordinates         Canadian border region
                        Latitude      Longitude
   Akron, Ohio        41�°05'00.2" N 81�°30'39.4" W                     7A
   Youngstown, Ohio   41�°05'57.2" N 80�°39'01.3" W                     7A
   Syracuse, New York 43�°03'04.2" N 76�°09'12.7" W                     7B

   (6) The channels listed in Table C6 and paragraph (c)(6)(i) of this
   section are available in the Canada Border Regions for non-cellular
   operations to eligible applicants in the Public Safety Category which
   consists of licensees eligible in the Public Safety Pool of subpart B
   of this part. 800 MHz high density cellular systems as defined in § 90.7
   are prohibited on these channels.

   Table C6—Public Safety Pool 806–816/851–861 MHz Band Channels in the
   Canada Border Regions
   Canada Border Region Channel Nos. Total
   Regions 1, 4, 5 and 6 231–260 30 Channels.
   Region 2 See paragraph (c)(6)(i) of this section
   Region 3 231–320, 501–508 90 Channels.
   Regions 7A and 8 269, 289, 311, 399, 439, 270, 290, 312, 400, 440, 279,
   299, 319, 339, 359, 280, 300, 320, 340, 360, 309, 329, 349, 369, 389,
   310, 330, 350, 370, 390, 313, 353, 393, 441, 461, 314, 354, 394, 448,
   468, 321, 341, 361, 381, 419, 328, 348, 368, 388, 420, 351, 379, 409,
   429, 449, 352, 380, 410, 430, 450, 391, 392, 401, 408, 421, 428, 459,
   460, 469, 470 70 Channels.
   Region 7B 231–260, 269, 289, 311, 399, 439, 270, 290, 312, 400, 440,
   279, 299, 319, 339, 359, 280, 300, 320, 340, 360, 309, 329, 349, 369,
   389, 310, 330, 350, 370, 390, 313, 353, 393, 441, 461, 314, 354, 394,
   448, 468, 315, 355, 395, 435, 475, 316, 356, 396, 436, 476, 317, 357,
   397, 437, 477, 318, 358, 398, 438, 478, 321, 341, 361, 381, 419, 328,
   348, 368, 388, 420, 331, 371, 411, 451, 491, 332, 372, 412, 452, 492,
   333, 373, 413, 453, 493, 334, 374, 414, 454, 494, 335, 375, 415, 455,
   495, 336, 376, 416, 456, 496, 337, 377, 417, 457, 497, 338, 378, 418,
   458, 498, 351, 379, 409, 429, 449, 352, 380, 410, 430, 450, 391, 392,
   401, 408, 421, 428, 459, 460, 469, 470, 431, 432, 433, 434, 471, 472,
   473, 474, 479, 480 170 Channels.

   (i) Channel numbers 1–230 are also available to eligible applicants in
   the Public Safety Category in the Canada Border Regions. The assignment
   of these channels will be done in accordance with the policies defined
   in the Report and Order of Gen. Docket No. 87–112 (See § 90.16). The
   following channels are available only for mutual aid purposes as
   defined in Gen. Docket No. 87–112: Channels 1, 39, 77, 115, 153.

   (ii) [Reserved]

   (7) The channels listed in Table C7 are available in the Canada Border
   Regions for the General Category. All entities will be eligible for
   licensing on these channels. 800 MHz high density cellular systems as
   defined in § 90.7 are permitted on these channels only as indicated in
   Table C7. The channels noted for Regions 1, 2, 3, 4, 5 and 6 where high
   density cellular systems are prohibited are all frequencies that are
   primary to Canada. Stations may be licensed on these Canada Primary
   channels according to paragraph (c)(4) of this section.

   Table C7—General Category 806–821/851–866 MHz Band Channels in the
   Canada Border Regions
   Canada border region General category channels where 800 MHz high
   density
   cellular systems
   are prohibited General category channels where 800 MHz high density
   cellular systems
   are permitted
   Regions 1, 4, 5 and 6 261–560 561–710
   Region 2 231–620 621–710
   Region 3 321–500 509–710
   Regions 7A and 8 231–260, 511–550 None
   Region 7B 511–550 None

   (8) The channels listed in Table C8 are available in the Canada Border
   Regions to applicants eligible in the Industrial/Business Pool of
   subpart C of this part but exclude Special Mobilized Radio Systems as
   defined in § 90.603(c). 800 MHz cellular high density systems as defined
   in § 90.7 are prohibited on these channels.

   Table C8—Business/Industrial/Land Transportation Pool 806–816/851–861
   MHz Band Channels in the Canada Border Regions
   Canada Border Region Channel Nos. Total
   Regions 1, 2, 3, 4, 5 and 6 None 0 Channels.
   Regions 7A, 7B and 8 261, 271, 281, 291, 301, 262, 272, 282, 292, 302,
   263, 273, 283, 293, 303, 264, 274, 284, 294, 304, 265, 275, 285, 295,
   305, 266, 276, 286, 296, 306, 267, 277, 287, 297, 307, 268, 278, 288,
   298, 308, 322, 362, 402, 442, 482, 323, 363, 403, 443, 483, 324, 364,
   404, 444, 484, 325, 365, 405, 445, 485, 326, 366, 406, 446, 486, 327,
   367, 407, 447, 487, 342, 382, 422, 462, 502, 343, 383, 423, 463, 503,
   344, 384, 424, 464, 504, 345, 385, 425, 465, 505, 346, 386, 426, 466,
   506, 347, 387, 427, 467, 507 100 Channels.

   (9) The channels listed in Table C9 are available in the Canada Border
   Regions to applicants eligible in the SMR category—which consists of
   Specialized Mobile Radio (SMR) stations and eligible end users. 800 MHz
   high density cellular systems, as defined in § 90.7, are prohibited on
   these channels.

   Table C9—SMR Category 806–816/851–861 MHz Channels Available for
   Site-Based Licensing in the Canada Border Regions
   Canada Border Region Channel Nos. Total
   Regions 1, 2, 3, 4, 5 and 6 None 0 Channels.
   Regions 7A and 8 315, 355, 395, 435, 475, 316, 356, 396, 436, 476, 317,
   357, 397, 437, 477, 318, 358, 398, 438, 478, 331, 371, 411, 451, 491,
   332, 372, 412, 452, 492, 333, 373, 413, 453, 493, 334, 374, 414, 454,
   494, 335, 375, 415, 455, 495, 336, 376, 416, 456, 496, 337, 377, 417,
   457, 497, 338, 378, 418, 458, 498, 431, 432, 433, 434, 471, 472, 473,
   474, 479, 480, 481, 488, 489, 490, 499, 500, 501, 508, 509, 510 80
   Channels.
   Region 7B 481, 488, 489, 490, 499, 500, 501, 508, 509, 510 10 Channels.

   (10) The channels listed in Table C10 are available in the Canada
   Border Regions to applicants eligible in the SMR category—which
   consists of Specialized Mobile Radio (SMR) stations and eligible end
   users. ESMR licensees who employ 800 MHz high density cellular systems,
   as defined in § 90.7, are permitted to operate on these channels. Some
   of the channels listed in Table C10 are primary to Canada as indicated
   in paragraph (c)(1) of this section. ESMR systems may be authorized on
   these Canada Primary channels according to paragraph (c)(4) of this
   section.

   Table C10—ESMR Category 817–824/862–869 MHz Channels Available for 800
   MHz High Density Systems
      Canada Border Region     Channel Nos.     Total
   Regions 1, 2, 3, 4, 5 and 6 711–830      120 Channels.
   Regions 7A, 7B and 8        551–830      280 Channels.

   (11) In Canada Border Regions 1, 2, 3, 4, 5 and 6, the following
   General Category channels are available for licensing to all entities
   except as described below in paragraphs (c)(11)(i) and (c)(11)(ii): in
   Regions 1, 4, 5 and 6, channels 261–560; in Region 2, channels 231–620
   and in Region 3, channels 321–500.

   (i) In a given 800 MHz NPSPAC region, the General Category channels
   listed paragraph (c)(11) of this section which are vacated by licensees
   relocating to channels 711–830 and which remain vacant after band
   reconfiguration will be available for licensing as follows:

   (A) Only to eligible applicants in the Public Safety Category until
   three years after the release of a public notice announcing the
   completion of band reconfiguration in that region;

   (B) Only to eligible applicants in the Public Safety or Critical
   Infrastructure Industry Categories from three to five years after the
   release of a public notice announcing the completion of band
   reconfiguration in that region; and

   (C) To all entities five years after release of a public notice
   announcing the completion of band reconfiguration in that region.

   (ii) The General Category channels listed in paragraph (c)(11) of this
   section are primary to Canada. Stations may be authorized on these
   Canada Primary channels according to paragraph (c)(4).

   (12) In Canada Border Regions 7A, 7B and 8, the following channels will
   be available as described in paragraphs (c)(12)(i) and (c)(12)(ii) of
   this section: for Canada Border Regions 7A and 8, channels 231–260 and
   channels below 471 in Tables C8 and C9; for Canada Border Region 7B all
   channels in Tables C8 and C9.

   (i) In a given 800 MHz NPSPAC region, the channels listed paragraph
   (c)(12) of this section which are vacated by licensees relocating to
   channels 511–830 and which remain vacant after band reconfiguration
   will be available as follows:

   (A) Only to eligible applicants in the Public Safety Category until
   three years after the release of a public notice announcing the
   completion of band reconfiguration in that region; and

   (B) Only to eligible applicants in the Public Safety or Critical
   Infrastructure Industry Categories from three to five years after the
   release of a public notice announcing the completion of band
   reconfiguration in that region.

   (ii) Five years after the release of a public notice announcing the
   completion of band reconfiguration in a given 800 MHz NPSPAC region,
   the channels listed in paragraph (c)(12) of this section will revert
   back to their original pool categories.

   (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 § 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 border)      1–200, 398, 399
   2      71�° W–80�°30' W (0–100 km from border)              1–120
   3      80�°30' W–85�° W (0–100 km from border)              1–340
   4      85�° W–121�°30' W (0–100 km from border)   1–200, 398, 399
   5      121�°30' W–127�° W (0–140 km from border)  1–200, 398, 399
   6      127�° W–143�° W (0–100 km from border)     1–200, 398, 399
   7      66�° W–121�°30' W (100–140 km from border)           1–399
   8      127�° W–143�° W (100–140 km from border)             1–399

   Note: For assignments in the 896–901/935–940 MHz bands, the cities of
   Akron, Ohio (41�°05'00" N, 81�°30'40" W) and Youngstown, Ohio (41�°05'57"
   N, 80�°39'02" W) are considered outside of Region 3, and Syracuse, New
   York (43�°03'04" N, 76�°09'14" 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 § 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]
   Region Channel 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^2)
      Feet             Meters
   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^2)
      Feet               Meters
   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]

   Editorial Note:   ForFederal Registercitations affecting § 90.619, see
   the List of CFR Sections Affected, which appears in the Finding Aids
   section of the printed volume and on GPO Access.