Section 73.3538, Application to Make Changes in an Existing Station, Section 73.1690(e), Modification of Transmission Systems

Section 73.3538(b)(1) of the Commission's rules requires a broadcast station to file an informal application to modify or discontinue the obstruction marking or lighting of an antenna supporting structure. Section 73.1690(e) of the Commission's rules requires AM, FM and TV station licensees to prepare an informal statement or diagram describing any electrical and mechanical modification to authorized transmitting equipment that can be made without prior Commission approval provided that equipment performance measurements are made to ensure compliance with FCC rules. This informal statement or diagram must be retained at the transmitter site as long as the equipment is in use.

The latest form for Section 73.3538, Application to Make Changes in an Existing Station, Section 73.1690(e), Modification of Transmission Systems expires 2022-01-31 and can be found here.