---
kind: "section"
citation: "47 C.F.R. § 18.303"
title: "47"
number: "18.303"
heading: "Prohibited frequency bands."
url: "https://uscodex.org/cfr/47/18.303"
---

# §18.303. Prohibited frequency bands.


Operation of ISM equipment within the following safety, search and rescue frequency bands is prohibited: 490-510 kHz, 2170-2194 kHz, 8354-8374 kHz, 121.4-121.6 MHz, 156.7-156.9 MHz, and 242.8-243.2 MHz.


## Notes

### Authority

Authority: 47 U.S.C. 154, 301, 302, 303, 304, 307.

### Source

Source: 50 FR 36067, Sept. 5, 1985, unless otherwise noted.