Sec. 73.311  Field strength contours.

    (a) Applications for FM broadcast authorizations must show the field 
strength contours required by FCC Form 301 or FCC Form 340, as 
appropriate.
    (b) The field strength contours provided for in this section shall 
be considered for the following purposes only:
    (1) In the estimation of coverage resulting from the selection of a 
particular transmitter site by an applicant for an FM broadcast station.
    (2) In connection with problems of coverage arising out of 
application of Sec. 73.3555.
    (3) In determining compliance with Sec. 73.315(a) concerning the 
minimum field strength to be provided over the principal community to be 
served.
    (4) In determining compliance with Sec. 73.215 concerning contour 
protection.

[ 28 FR 13623 , Dec. 14, 1963, as amended at  31 FR 10126 , July 27, 1966; 
 32 FR 11471 , Aug. 9, 1967;  52 FR 10570 , Apr. 2, 1987;  54 FR 9802 , Mar. 
8, 1989]