Sec. 90.405  Permissible communications.

    (a) Stations licensed under this part may transmit only the 
following types of communication:
    (1) Any communication related directly to the imminent safety-of-
life or property;
    (2) Communications directly related and necessary to those 
activities which make the licensee eligible for the station license held 
under this part. In addition, when communication service is provided 
under the cooperative sharing provisions of Sec. 90.179, the licensee 
providing such service may transmit communications related to the 
activities for which the parties receiving the service would be eligible 
to be licensed.
    (3) Communications for testing purposes required for proper station 
and system maintenance. However, each licensee shall keep such tests to 
a minimum and shall employ every measure to avoid harmful interference.
    (b) The provisions contained in paragraph (a) of this section do not 
apply where a single base station licensee has been authorized to use a 
channel above 470 MHz on an exclusive basis, or to stations licensed 
under this part that are classified as CMRS providers under part 20 of 
this chapter.
[ 50 FR 6182 , Feb. 14, 1985, as amended at  59 FR 59965 , Nov. 21, 1994]