Goto Section: 90.171 | 90.175 | Table of Contents
FCC 90.173
Revised as of October 1, 2014
Goto Year:2013 |
2015
§ 90.173 Policies governing the assignment of frequencies.
(a) Except as indicated in paragraph (j) of this section, the
frequencies which ordinarily may be assigned to stations in the
services governed by this part are listed in subparts B, C and F of
this part. Except as otherwise specifically provided in this part,
frequencies assigned to land mobile stations are available on a shared
basis only and will not be assigned for the exclusive use of any
licensee.
(b) All applicants and licensees shall cooperate in the selection and
use of frequencies in order to reduce interference and make the most
effective use of the authorized facilities. Licensees of stations
suffering or causing harmful interference are expected to cooperate and
resolve this problem by mutually satisfactory arrangements. If the
licensees are unable to do so, the Commission may impose restrictions
including specifying the transmitter power, antenna height, or area or
hours of operation of the stations concerned. Further the use of any
frequency at a given geographical location may be denied when, in the
judgment of the Commission, its use in that location is not in the
public interest; the use of any frequency may be restricted as to
specified geographical areas, maximum power, or such other operating
conditions, contained in this part or in the station authorization.
(c) Frequencies allocated for Federal Government radio stations under
Executive order of the President may be authorized for the use of
stations in these services upon appropriate showing by the applicant
that such assignment is necessary for inter-communication with
government stations or required for coordination with activities of the
Federal Government, and where the Commission finds, after consultation
with the appropriate government agency or agencies, that such
assignment is necessary.
(d) The radio facilities authorized under this part are intended for
use in connection with and as an adjunct to the primary governmental or
business activities of the licensee.
(e) Persons requesting authority to operate in the band 25-50 MHz
should recognize that this band is shared with various services in
other countries and that harmful interference may be caused by the
propagation of signals in this band from distant stations. No
protection from such harmful interference generally can be expected.
(f) Applications for stations in the 150-174 MHz and 421-512 MHz bands
for operation on frequencies 15 kHz or less removed from existing
stations in the same geographic area will be granted based upon a
recommendation from the applicable frequency coordinator as specified
in § § 90.20(c)(2) and 90.35(b)(2).
(g) In the states of Alaska and Hawaii, and in areas outside the
continental limits of the United States and the adjacent waters, the
frequencies above 150.8 MHz which are listed elsewhere in this part as
available for assignment to base stations or mobile stations in the
Industrial/Business Pool are also available for assignment to
operational fixed stations in the Industrial/Business Pool on a
secondary basis.
(h) In the Public Safety Pool, base stations may be authorized to
operate on a secondary basis on frequencies below 450 MHz which are
available to mobile stations.
(i) In the 450-470 MHz band, the frequencies are ordinarily assigned in
pairs, with the mobile station transmit frequency 5 MHz above the
paired base station transmit frequency. In the 470-512 MHz band, the
frequencies are ordinarily assigned in pairs with the mobile station
transmit frequency 3 MHz above the paired base station transmit
frequency. In the Industrial/Business Pool, in the 150 MHz band, the
frequencies subject to § 90.35(c)(6) may be assigned in pairs with the
separation between base and mobile frequencies being 5.26 MHz. A mobile
station may be assigned the frequency which would normally be assigned
to a base station for single-frequency operation. However, this
single-frequency operation may be subject to interference that would
not occur to a two-frequency system.
(j) Frequencies other than those listed in subparts B and C of this
part may be assigned in the 150-174 MHz, 421-430 MHz, 450-470 MHz, and
470-512 MHz bands, provided the following conditions are met:
(1) Such applications must be accompanied by a showing of frequency
coordination in accordance with the requirements of § 90.175;
(2) The frequencies must not be available in any other rule part of
this chapter; and
(3) The authorized bandwidth of any system operating in accordance with
this paragraph must not overlap spectrum available in other rule parts
of this chapter unless that spectrum is also allocated in part 90.
(k) This paragraph is only applicable to entities with Finder's
Preference requests pending before the Commission as of July 29, 1998.
Notwithstanding any other provisions of this part, any eligible person
shall be given a dispositive preference for a channel assignment on an
exclusive basis in the 220-222 MHz, 470-512 MHz, and 800/900 MHz
(except on frequencies designated exclusively for SMR service) bands by
submitting information that leads to the recovery of channels in these
bands. Recovery of such channels must result from information provided
regarding the failure of existing licensees to comply with the
provisions of § 90.155, § 90.157, § 90.629, § 90.631 (e) or (f), or
§ 90.633 (c) or (d).
(l) In the 150-174 MHz band, except where otherwise specifically
provided, authorizations for frequencies that were available prior to
August 18, 1995 will be granted with channel bandwidths of 25 kHz or
less. Authorizations for all other frequencies in this band will be
granted with channel bandwidths of 12.5 kHz or less (i.e., in the
Public Safety Pool, frequencies subject to § § 90.20 (d)(27) and
(d)(44), and in the Industrial/Business Pool, frequencies subject to
§ § 90.35 (c)(30) and (c)(33)).
(m) In the 421-512 MHz band, except where otherwise specifically
provided, authorizations for frequencies that were available prior to
August 18, 1995 will be granted with channel bandwidths of 25 kHz or
less. New authorizations for frequencies 12.5 kHz removed from these
frequencies will be made for channel bandwidths of 12.5 kHz or less
(i.e., in the Public Safety Pool, frequencies subject to § 90.20(d)(27)
and in the Industrial/Business Pool, frequencies subject to
§ 90.35(c)(30)). Authorizations for frequencies 6.25 kHz removed from
these frequencies will be granted with channel bandwidths of 6.25 kHz
or less (i.e., in the Public Safety Pool, frequencies subject to
§ 90.20(d)(44), and in the Industrial/Business Pool, frequencies
subject to § 90.35(c)(33)).
(n) Any recovered channels in the 800 MHz SMR service will revert
automatically to the holder of the EA license within which such
channels are included. If there is no EA licensee for recovered
channels, such channels will be retained by the Commission for future
licensing.
(Secs. 4, 303, 307, 48 Stat., as amended, 1066, 1082, 1083; 47 U.S.C.
154, 303, 307)
[ 43 FR 54791 , Nov. 22, 1978]
Editorial Note: For Federal Register citations affecting § 90.173, see
the List of CFR Sections Affected, which appears in the Finding Aids
section of the printed volume and at www.fdsys.gov.
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Goto Section: 90.171 | 90.175
Goto Year: 2013 |
2015
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