Sec. 73.158  Directional antenna monitoring points.

    (a) When a licensee of a station using a directional antenna system 
finds that a field monitoring point, as specified on the station 
authorization, is no longer accessible for use or is unsuitable because 
of nearby construction or other disturbances to the measured field, an 
informal application to change the monitoring point location is to be 
promptly submitted to the FCC in Washington, DC. The application must 
include the following information:
    (1) A partial proof of performance conducted on the radial 
containing the monitoring point to be changed.
    (2) A written description of the routing to the new selected 
monitoring point.
    (3) A map showing the location and routing to the new selected 
monitoring point.
    (4) A photograph showing the new monitoring point in relation to 
nearby permanent landmarks that can be used in locating the point 
accurately at all times throughout the year. Do not use seasonal or 
temporary features in either the written descriptions or photographs as 
landmarks for locating field points.
    (b) When the descriptive routing to reach any of the monitoring 
points as shown on the station license is no longer correct due to road 
or building construction or other changes, the licensee must prepare and 
file with the FCC, in Washington, DC, a request for a corrected station 
license showing the new routing description. A copy of the description 
is to be posted with the existing station license. The notification is 
to include the information specified in paragraphs (a) (2) and (3) of 
this section.

[ 47 FR 28387 , June 30, 1982]