Section 90.483, Permissible Methods and Requirements of Interconnecting Private and Public Systems of Communications

Section 90.483 requires when a frequency is shared by more than one system, automatic monitoring equipment must be installed at the base station to prevent activation of the transmitter when signals of co-channel stations are present and activation would interfere with communications in progress. Licensees may operate without this equipment if they have obtained the consent of all co-channel licensees located within a 120 kilometer (75 mile) radius of the interconnected base station transmitter. A statement must be submitted to the FCC indicating that all co-channel licensees have consented to operate without the monitoring equipment. The information is used by the FCC to ensure that licensees comply with the Commission's technical and operational duties.

The latest form for Section 90.483, Permissible Methods and Requirements of Interconnecting Private and Public Systems of Communications expires 2022-10-31 and can be found here.