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Federal Register / Vol. 86, No. 149 / Friday, August 6, 2021 / Proposed Rules TABLE B TO PARAGRAPH bMINIMUM DISTANCE SEPARATION REQUIREMENTS IN KILOMETERS
Co-channel
Adjacent channels
I.F.

Relation 0 kHz A1A1
A1A
A1B1
A1B
A1C1
A1C
AA
AB1
AB
AC1
AC
B1B1
B1B
B1C1
B1C
BB
BC1
BC
C1C1
C1C
CC

3 Unless demonstrating compliance with the overlap provisions of the 1992
United States-Mexico FM Broadcasting Agreement, any domestic U.S.
assignment or allotment within 320
kilometers 199 miles of the common border must be separated from Mexican assignments or allotments by not less than the distances given in Table C in this paragraph b3. However, the I.F.
minimum distance separations in Table C apply regardless of short-spaced status. When applying Table C

3. Amend 73.316 by revising the second sentence of c2ixB, removing paragraph d, and redesignating paragraph e as paragraph d to read as follows:

73.316

200 kHz 78
131
164
190
223
227
151
184
210
243
247
197
223
256
259
237
271
274
292
302
306

400 kHz
45
78
98
117
148
162
98
119
137
168
182
131
149
181
195
164
195
209
217
230
241

FM antenna systems.

c
2
ix
B The application for license must also demonstrate that coverage of the community of license by the 70 dBu contour is maintained for stations authorized pursuant to 73.215 on Channels 221 through 300, as required by 73.315a, while noncommercial educational stations operating on Channels 201 through 220 must show that the proposed transmitter location will provide a minimum field strength of 1 mV/m 60 dBu over at least 50
percent of its community of license or
600 kHz
24
44
57
71
92
103
51
64
78
99
110
70
84
108
116
94
115
125
134
144
153

10.6/10.8 MHz
20
40
53
67
88
99
42
55
69
90
101
57
71
92
103
74
95
106
101
111
113

reach 50 percent of the population within the community.

73.501

Amended
4. Amend 73.501 by removing and reserving paragraph b.
5. Amend 73.509 by revising paragraph b to read as follows:

73.509

Prohibited overlap.

b An application by a Class D
secondary station, other than an application to change class, will not be accepted if the proposed operation would involve overlap of signal strength contours with any other station as set forth in Table 2 to paragraph b:

TABLE 2 TO PARAGRAPH b Frequency separation
Contour of proposed station
Co-channel
200 kHz
400/600 kHz

0.1 mV/m 40 dBu
0.5 mV/m 54 dBu
100 mV/m 100 dBu

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Contour of any other station 1 mV/m 60 dBu.
1 mV/m 60 dBu.
1 mV/m 60 dBu.

6. Amend 73.1665 by revising paragraph b and removing Table 1 to paragraph b to read as follows:

7. Amend 73.1690 by revising the second sentence of paragraph c8i to read as follows:

percent of the population within the community.

73.1665

73.1690
systems.

PART 74EXPERIMENTAL RADIO, AUXILIARY, SPECIAL BROADCAST
AND OTHER PROGRAM
DISTRIBUTIONAL SERVICES

Main transmitters.

b There is no maximum manufacturer-rated power limit for AM, FM, TV or Class A TV station transmitters.

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i Noncommercial educational FM stations must continue to provide a 60 dBu contour over at least 50 percent of its community of license or reach 50

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19
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10
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22
29
24
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40
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24
40
40
48
48
48

8. The authority citation for part 74
continues to read as follows:

Authority: 47 U.S.C. 154, 302a, 303, 307, 309, 310, 336 and 554.

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