Sec. 90.353  LMS operations in the 902-928 MHz band.

    LMS systems may be authorized within the 902-928 MHz band, subject 
to the conditions in this section. LMS licensees are required to 
maintain whatever records are necessary to demonstrate compliance with 
these provisions and must make these records available to the Commission 
upon request:
    (a) LMS operations will not cause interference to and must tolerate 
interference from industrial, scientific, and medical (ISM) devices and 
radiolocation Government stations that operate in the 902-928 MHz band.
    (b) LMS systems are authorized to transmit status and instructional 
messages, either voice or non-voice, so long as they are related to the 
location or monitoring functions of the system.
    (c) LMS systems may utilize store and forward interconnection, where 
either transmissions from a vehicle or object being monitored are stored 
by the LMS provider for later transmission over the public switched 
network (PSN), or transmissions received by the LMS provider from the 
PSN are stored for later transmission to the vehicle or object being 
monitored. Real-time interconnection between vehicles or objects being 
monitored and the

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PSN will only be permitted to enable emergency communications related to 
a vehicle or a passenger in a vehicle. Such real-time, interconnected 
communications may only be sent to or received from a system dispatch 
point or entities eligible in the Public Safety or Special Emergency 
Radio Services. See subparts B and C of this part.
    (d) Multilateration LMS systems will be authorized on a primary 
basis within the bands 904-909.75 MHz and 921.75-927.25 MHz. 
Additionally, multilateration and non-multilateration systems will share 
the 919.75-921.75 MHz band on a co-equal basis. Licensing will be on the 
basis of Major Trading Area (MTA) service areas for multilateration 
systems, with one exclusive MTA license being issued for each of these 
three sub-bands. Except as provided in paragraph (f) of this section, 
multilateration MTA licensees may be authorized to operate on only one 
of the three multilateration bands within a given MTA. Additionally, MTA 
multilateration LMS licenses will be conditioned upon the licensee's 
ability to demonstrate through actual field tests that their systems do 
not cause unacceptable levels of interference to 47 CFR part 15 devices.
    (e) Multilateration MTA-licensed systems and grandfathered AVM 
systems (see Sec. 90.363) are authorized on a shared basis and must 
cooperate in the selection and use of frequencies in accordance with 
Sec. 90.173(b).
    (f) Multilateration MTA licensees may be authorized to operate on 
both the 919.75-921.75 MHz and 921.75-927.25 MHz bands within a given 
MTA (see Sec. 90.209(b)(10)).
    (g) Multilateration LMS systems whose primary operations involve the 
provision of vehicle location services, may provide non-vehicular 
location services.
    (h) Non-multilateration stations are authorized to operate on a 
shared, non-exclusive basis in the 902-904 MHz and 909.75-921.75 MHz 
sub-bands. Non-multilateration systems and multilateration systems will 
share the 919.75-921.75 MHz band on a co-equal basis. Non-
multilateration LMS systems may not provide non-vehicular location 
services. The maximum antenna height above ground for non-
multilateration LMS systems is 15 meters.