Sec. 101.509  Interference protection criteria.

    (a) As a condition for use of frequencies in this service each 
licensee is required to:
    (1) Engineer the system to be reasonably compatible with adjacent 
and co-channel operations in the same or adjacent areas on all 
frequencies; and
    (2) Cooperate fully and in good faith to resolve whatever potential 
interference and transmission security problems may be present in 
adjacent and co-channel operations.
    (b) All harmful interference to other users of co-channel and 
adjacent channel use in the same or adjacent geographical area are 
prohibited. In areas where Economic Areas are in close proximity, 
careful consideration should be given to minimum power requirements and 
to the location, height, and radiation pattern of the transmitting and 
receiving antennas. Licensees are expected to cooperate fully in 
attempting to resolve problems of potential interference before bringing 
the matter to the attention of the Commission.
    (c) Licensee shall coordinate their facilities whenever the 
facilities have optical line-of-sight into other licensees' areas or are 
within the same geographic area. Licensees are encouraged to develop 
operational agreements with relevant licensees in the same or adjacent 
areas. Incumbent SMSA licensee(s) shall retain exclusive rights to its 
channel(s) within its SMSA and must be protected.
    (d) Licensees shall comply with the appropriate coordination 
agreements between the United States and Canada and the United States 
and Mexico concerning cross-border sharing and use of the 24 GHz bands 
which may require using channels pairs in accordance with the table in 
Sec. 101.147(r)(9).
    (e) The Commission recommends that coordination is not necessary if 
the power flux density (pfd) at the boundary of the relevant adjacent 
area is lower than -114 dBW/m\2\ in any 1 MHz. This value can be changed 
and agreed upon by both coordinating parties. Licensees should be able 
to deploy with a pfd up to -94 dBW/m\2\ in any 1 MHz at the boundary of 
the relevant adjacent area without negatively affecting the successful 
operations of the adjacent area licensee.

[ 65 FR 59360 , Oct. 5, 2000]

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