Sec. 21.405  Supplementary showing required.

    (a) Authorizations for development of a proposed radio service in 
the services included in this part will be issued only upon a showing 
that the applicant has a definite program of research and development, 
the details of which shall be set forth, which has reasonable promise of 
substantial contribution to these services within the term of such 
authorization. A specific showing should be made as to the factors which 
qualify the applicant technically to conduct the research and 
development program, including a description of the nature and extent of 
engineering facilities that the applicant has available for such 
purposes.
    (b) Expiring developmental authorizations may be renewed only upon 
the applicant's compliance with the applicable requirements of 
Sec. 21.406 (a) and (b) relative to the authorization sought to be 
renewed and upon a factual showing that further progress in the program 
of research and development requires further radio transmission and that 
the public interest, convenience or necessity would be served by renewal 
of such authorization.
[ 44 FR 60534 , Oct. 19, 1979, as amended at  52 FR 37784 , Oct. 9, 1987]