§  5.115   Station identification.

   (a) Conventional experimental radio licenses. A licensee, unless
   specifically exempted by the terms of the station authorization, shall
   transmit its assigned call sign at the end of each complete
   transmission: Provided, however, that the transmission of the call sign
   at the end of each transmission is not required for projects requiring
   continuous, frequent, or extended use of the transmitting apparatus,
   if, during such periods and in connection with such use, the call sign
   is transmitted at least once every thirty minutes. The station
   identification shall be transmitted in clear voice or Morse code. All
   digital encoding and digital modulation shall be disabled during
   station identification.

   (b) Broadcast experimental licenses. Each experimental broadcast
   station must transmit aural or visual announcements of its call letters
   and location at the beginning and end of each period of operation, and
   at least once every hour during operation.

   (c) Program experimental radio licenses. Program experimental radio
   licenses shall comply with either paragraph (c)(1) or (c)(2):

   (1) Stations may transmit identifying information sufficient to
   identify the license holder and the geographic coordinates of the
   station. This information shall be transmitted at the end of each
   complete transmission except that: this information is not required at
   the end of each transmission for projects requiring continuous,
   frequent, or extended use of the transmitting apparatus, if, during
   such periods and in connection with such use, the information is
   transmitted at least once every thirty minutes. The station
   identification shall be transmitted in clear voice or Morse code. All
   digital encoding and digital modulation shall be disabled during
   station identification; or

   (2) Stations may post information sufficient to identify it on the
   Commission's program experimental registration Web site.

   [ 78 FR 25162 , Apr. 29, 2013]