Sec.  23.27   Experimental research.

   The licensee of a station may be authorized to use a transmitter which is
   licensed for fixed public or fixed public press service for experimental
   research in accordance with the rules and regulations governing the
   experimental service upon the condition that no interference will be caused
   to the public service. Experimental (Research) and Experimental
   (Developmental) Stations authorized to operate as point-to-point telegraph
   or telephone stations shall comply with the rules governing fixed public
   radio services in addition to the rules and regulations governing
   experimental radio services.