47 C.F.R. § 23.19 Use of directional antennas.
Title 47 - Telecommunication
Insofar as is practicable, directional antennas, of type consistent with the current state of art, shall be used on all circuits for both transmitting and receiving. [38 FR 22480, Aug. 21, 1973]
Title 47: Telecommunication
PART 23—INTERNATIONAL FIXED PUBLIC RADIOCOMMUNICATION SERVICES
Fixed Public Services
§ 23.19 Use of directional antennas.