Sec. 90.155  Time in which station must be placed in operation.

    (a) All stations authorized under this part, except as provided in 
paragraphs (b) and (d) of this section and in Secs. 90.629, 90.631(f), 
90.665, and 90.685, must be placed in operation within

[[Page 433]]

eight (8) months from the date of grant or the authorization cancels 
automatically and must be returned to the Commission.
    (b) For local government entities only, a period longer than eight 
months for placing a station in operation may be authorized by the 
Commission on a case-by-case basis, where the applicant submits a 
specific schedule for the completion of each portion of the entire 
system, along with a showing that the system has been approved and 
funded for implementation in accordance with that schedule. See also 
Secs. 90.631 and 90.633.
    (c) For purposes of this section, a base station is not considered 
to be placed in operation unless at least one associated mobile station 
is also placed in operation. See also Secs. 90.633(d) and 90.631(f).
    (d) Multilateration LMS systems authorized in accordance with 
Sec. 90.353 must be constructed and placed in operation within twelve 
(12) months from the date of grant or the authorization cancels 
automatically and must be returned to the Commission. MTA-licensed 
multilateration LMS systems will be considered constructed and placed in 
operation if such systems construct a sufficient number of base stations 
that utilize multilateration technology (see paragraph (e) of this 
section) to provide multilateration location service to a substantial 
portion of at least one BTA in the MTA.
    (e) A multilateration LMS station will be considered constructed and 
placed in operation if it is built in accordance with its authorized 
parameters and is regularly interacting with one or more other stations 
to provide location service, using multilateration technology, to one or 
more mobile units. Specifically, LMS multilateration stations will only 
be considered constructed and placed in operation if they are part of a 
system that can interrogate a mobile, receive the response at 3 or more 
sites, compute the location from the time of arrival of the responses 
and transmit the location either back to the mobile or to a subscriber's 
fixed site.
[ 45 FR 81208 , Dec. 10, 1980, as amended at  47 FR 41044 , Sept. 16, 1982; 
 48 FR 51927 , Nov. 15, 1983;  54 FR 4030 , Jan. 27, 1989;  56 FR 65859 , Dec. 
19, 1991;  60 FR 15252 , Mar. 23, 1995;  61 FR 6155 , Feb. 16, 1996]