Sec. 90.135. In all cases a detailed description of how interconnection 
is accomplished must be maintained by licensees as part of their station 
records. See Sec. 90.433.
    (b) In the frequency ranges 806-824 MHz, 851-869 MHz, 896-901 MHz, 
and 935-940 MHz, interconnection with the public switched telephone 
network is authorized under the following conditions:
    (1) Interconnected operation is on a secondary basis to dispatch 
operation. This restriction will not apply to trunked systems or on any 
channel assigned exclusively to one licensee.
    (2) Interconnection may be accomplished at any location through a 
separate or shared interconnection device. When land stations subject to 
this part are multiple licensed or shared by authorized users, 
arrangements for telephone service must be made with a duly authorized 
carrier by users, licensees, or their authorized agents on a non-profit 
cost sharing basis. When telephone service costs are shared, at least 
one licensee participating in the cost sharing arrangement must maintain 
cost sharing records and the costs must be distributed at least once a 
year. Licensees, users, or their authorized agents may also make joint 
use arrangements with a duly authorized carrier and arrange that each 
licensee or user pay the carrier directly for the licensee's or user's 
share of the joint use of the shared telephone service. A report of the 
cost distribution must be placed in the licensee's station records and 
made available to participants in the sharing and the Commission upon 
request. In all cases, arrangements with the duly authorized carrier 
must disclose the number of licensees and users and the nature of the 
use.
    (c) Interconnection of facilities in the Radiolocation Service 
(subpart F) will not be permitted.
    (d) In the frequency ranges below 800 MHz, interconnection with the 
public switched telephone network is authorized under the following 
conditions:
    (1) Interconnected operation is on a secondary basis to dispatch 
operation. This restriction will not apply to trunked systems or on any 
channel assigned exclusively to one licensee.
    (2) Interconnection may be accomplished at any location through a 
separate or shared interconnection device. When land stations subject to 
this part are multiple licensed or shared by authorized users, 
arrangements for telephone service must be made with a duly authorized 
carrier by users, licensees, or their authorized agents on a non-profit 
cost sharing basis. When telephone service costs are shared, at least 
one licensee participating in the cost sharing arrangement must maintain 
cost sharing records and the costs must be distributed at least once a 
year. Licensees, users, or their authorized agents may also make joint 
use arrangements with a duly authorized carrier and arrange that each 
licensee or user pay the carrier directly for the licensee's or user's 
share of the joint use of the shared telephone service. A report of the 
cost distribution must be placed in the licensee's station records and 
made available to participants in the sharing and the Commission upon 
request. In all cases, arrangements with the duly authorized carrier 
must disclose the number of licensees and users and the nature of the 
use.
    (3) For licensees in the Industrial/Business Pool and those 
licensees who establish eligibility pursuant to Sec. 90.20(a)(2), except 
for Secs. 90.20(a)(2)(i) and 90.20(a)(2)(ii) and medical emergency 
systems in the 450-470 MHz band, interconnection will be permitted only 
where the base station site or sites proposed stations are located 120 
km (75 mi.) or more from the designated centers of the urbanized areas 
listed below. If these licensees seek to connect within 120 km (75 mi.) 
of the 25 cities, they must obtain the consent of all co-channel 
licensees located both within 120 km (75 mi.) of the center of the city; 
and within 120 km (75 mi.) of the interconnected base station 
transmitter. The consensual agreements among the co-channel licensees 
must specifically state the terms agreed upon and a statement must be 
submitted to the Commission indicating that all co-channel licensees 
have consented to the use of interconnection. If a licensee has agreed 
to the use of interconnection on the channel, but later decides against 
the use of interconnection, the licensee may request that the

[[Page 520]]

co-channel licensees reconsider the use of interconnection. If the 
licensee is unable to reach an agreement with co-channel licensees, the 
licensee may request that the Commission consider the matter and assign 
it to another channel. If a new licensee is assigned to a frequency 
where all the co-channel licensees have agreed to the use of 
interconnection and the new licensee does not agree, the new licensee 
may request that the co-channel licensees reconsider the use of 
interconnection. If the new licensee can not reach an agreement with co-
channel licensees it may request that the Commission reassign it to 
another channel.

------------------------------------------------------------------------
                                                   North         West   
                Urbanized area                   lattitude    longitude 
------------------------------------------------------------------------
New York, NY-northeastern NJ..................  40 deg.45'0             
                                                        6''  73 deg.59'3
                                                                     9''
Los Angeles-Long Beach, CA....................  34 deg.03'1             
                                                        5''  118 deg.14'
                                                                    28''
Chicago, IL...................................  41 deg.52'2             
                                                        8''  87 deg.38'2
                                                                     2''
Philadelphia, PA-New Jersey...................  39 deg.56'5             
                                                        8''  75 deg.09'2
                                                                     1''
Detroit, MI...................................  42 deg.19'4             
                                                        8''  83 deg.02'5
                                                                     7''
San Francisco-Oakland, CA.....................  37 deg.46'3             
                                                        9''  122 deg.24'
                                                                    40''
Boston, MA....................................  42 deg.21'2             
                                                        4''  71 deg.03'2
                                                                     5''
Washington, DC-Maryland-Virginia..............  38 deg.53'5             
                                                        1''  77 deg.00'3
                                                                     3''
Cleveland, OH.................................  41 deg.29'5             
                                                        1''  81 deg.41'5
                                                                     0''
St. Louis, MO-Illinois........................  38 deg.37'4             
                                                        5''  90 deg.12'2
                                                                     2''
Pittsburgh, PA................................  40 deg.26'1             
                                                        9''  80 deg.00'0
                                                                     0''
Minneapolis-St. Paul, MN......................  44 deg.58'5             
                                                        7''  93 deg.15'4
                                                                     3''
Houston, TX...................................  29 deg.45'2             
                                                        6''  95 deg.21'3
                                                                     7''
Baltimore, MD.................................  39 deg.17'2             
                                                        6''  76 deg.36'4
                                                                     5''
Dallas, TX....................................  32 deg.47'0             
                                                        9''  96 deg.47'3
                                                                     7''
Milwaukee, WI.................................  43 deg.02'1             
                                                        9''  87 deg.54'1
                                                                     5''
Seattle-Everett, WA...........................  47 deg.36'3             
                                                        2''  122 deg.20'
                                                                    12''
Miami, FL.....................................  25 deg.46'3             
                                                        7''  80 deg.11'3
                                                                     2''
San Diego, CA.................................  32 deg.42'5             
                                                        3''  117 deg.09'
                                                                    21''
Atlanta, GA...................................  33 deg.45'1             
                                                        0''  84 deg.23'3
                                                                     7''
Cincinnati, OH-Kentucky.......................  39 deg.06'0             
                                                        7''  84 deg.30'3
                                                                     5''
Kansas City, MO-Kansas........................  39 deg.04'5             
                                                        6''  94 deg.35'2
                                                                     0''
Buffalo, NY...................................  42 deg.52'5             
                                                        2''  78 deg.52'2
                                                                     1''
Denver, CO....................................  39 deg.44'5             
                                                        8''  104 deg.59'
                                                                    22''
San Jose, CA..................................  37 deg.20'1             
                                                        6''  121 deg.53'
                                                                    24''
------------------------------------------------------------------------

    (e) Additional frequencies shall not be assigned to enable any 
licensee to employ a preferred interconnection capability.
    (f) Paging systems operating on frequencies in the bands below 800 
MHz are not subject to the interconnection provisions of 
Sec. 90.477(d)(3).
[47 1997 FR 17520 , Apr. 23, 1982, as amended at  48 FR 29518 , June 27, 1983; 
 50 FR 15152 , Apr. 17, 1985;  51 FR 14998 , Apr. 22, 1986;  51 FR 37401 , 
Oct. 22, 1986;  52 FR 15501 , Apr. 29, 1987;  52 FR 29856 , Aug. 12, 1987; 
 53 FR 1025 , Jan. 15, 1988;  58 FR 44961 , Aug. 25, 1993;  61 FR 6576 , Feb. 
21, 1996;  62 FR 18934 , Apr. 17, 1997]

    Effective Date Note: At  62 FR 18934 , Apr. 17, 1997, Sec. 90.477 was 
amended by revising the first two sentences of paragraph (d)(3), 
effective Oct. 17, 1997.