---
kind: "section"
citation: "47 C.F.R. § 5.77"
title: "47"
number: "5.77"
heading: "Change in equipment and emission characteristics."
url: "https://uscodex.org/cfr/47/5.77"
---

# §5.77. Change in equipment and emission characteristics.

- (a) The licensee of a conventional, broadcast, or Spectrum Horizons experimental radio station may make any changes in equipment that are deemed desirable or necessary provided:
  - (1) That the operating frequency is not permitted to deviate more than the allowed tolerance;
  - (2) That the emissions are not permitted outside the authorized band;
  - (3) That the ERP (or EIRP) and antenna complies with the license and the regulations governing the same; and
- (b) For conventional or Spectrum Horizons experimental radio stations, the changes permitted in [paragraph (a)](#a) of this section may be made without prior authorization from the Commission provided that the licensee supplements its application file with a description of such change. If the licensee wants these emission changes to become a permanent part of the license, an application for modification must be filed.
- (c) Prior authorization from the Commission is required before the following antenna changes may be made at a station at a fixed location:
  - (1) Any change that will either increase the height of a structure supporting the radiating portion of the antenna or decrease the height of a lighted antenna structure.
  - (2) Any change in the location of an antenna when such relocation involves a change in the geographic coordinates of latitude or longitude by one second or more, or when such relocation involves a change in street address.

## Notes

### Amendments

[78 FR 25162, Apr. 29, 2013, as amended at 84 FR 25690, June 4, 2019]

### Authority

Authority: 47 U.S.C. 154, 301, 302, 303, 307, 336.

### Source

Source: 78 FR 25162, Apr. 29, 2013, unless otherwise noted.

### Amendments

[78 FR 25162, Apr. 29, 2013, as amended at 84 FR 25690, June 4, 2019]