Sec. 90.513  Special provisions.

    (a) The developmental program as described by the application for 
authorization shall be followed unless the Commission shall otherwise 
direct.
    (b) Where some phases of the developmental program are not covered 
by the general rules in this chapter and the rules in this part, the 
Commission may specify additional requirements or conditions as deemed 
necessary in the public interest, convenience, or necessity.
    (c) The Commission may, from time to time, require a station engaged 
in developmental work to conduct special tests which are reasonable and 
desirable to the authorized developmental program.