47 CFR Section 73.1680 requires that
licensees of AM, FM or TV stations submit an informal request to
the FCC (within 24 hours of commencement of use) to continue
operation with an emergency antenna. An emergency antenna is one
that is erected for temporary use after the authorized main and
auxiliary antennas are damaged and cannot be used.
USC 154 Name of Law: Communications Act of 1934, as amended