47 C.F.R. § 5.125 Authorized points of communication.
Title 47 - Telecommunication
Generally, stations in the Experimental Radio Service may communicate only with other stations licensed in the Experimental Radio Service. Nevertheless, upon a satisfactory showing that the proposed communications are essential to the conduct of the research project, authority may be granted to communicate with stations in other services and U.S. Government stations.
Title 47: Telecommunication
PART 5—EXPERIMENTAL RADIO SERVICE (OTHER THAN BROADCAST)
Subpart C—Technical Standards and Operating Requirements
§ 5.125 Authorized points of communication.