Sec. 90.663  MTA-based SMR system operations.

    (a) MTA-based licensees authorized in the 896-901/935-940 MHz band 
pursuant to Sec. 90.661 may construct and operate base stations using 
any frequency identified in their spectrum block anywhere within their 
authorized MTA, provided that:
    (1) The MTA licensee affords protection, in accordance with 
Sec. 90.621(b), to all sites for which applications were filed on or 
prior to August 9, 1994.
    (2) The MTA licensee complies with any rules and international 
agreements that restrict use of frequencies identified in their spectrum 
block, including

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the provisions of Sec. 90.619 relating to U.S./Canadian and U.S./Mexican 
border areas.
    (3) The MTA licensee limits its field strength at any location on 
the border of the MTA service area in accordance with Sec. 90.671 and 
masks its emissions in accordance with Sec. 90.669.
    (b) In the event that the authorization for a previously authorized 
co-channel station within the MTA licensee's authorized spectrum block 
is terminated or revoked, the MTA licensee's co-channel obligations to 
such station will cease upon deletion of the facility from the 
Commission's licensing record. The MTA licensee then will be able to 
construct and operate base stations using such frequency.
[ 60 FR 21991 , May 4, 1995]