47 CFR § 90.281 - Restrictions on operational fixed stations in the 421-430 MHz band.

---
identifier: "/us/cfr/t47/s90.281"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 90.281 - Restrictions on operational fixed stations in the 421-430 MHz band."
title_number: 47
title_name: "Telecommunication"
section_number: "90.281"
section_name: "Restrictions on operational fixed stations in the 421-430 MHz band."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "D"
subchapter_name: "SAFETY AND SPECIAL RADIO SERVICES"
part_number: "90"
part_name: "PRIVATE LAND MOBILE RADIO SERVICES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 154(i), 161, 303(g), 303(r), 332(c)(7), 1401-1473"
regulatory_source: "43 FR 54791, Nov. 22, 1978, unless otherwise noted."
cfr_part: "90"
---


# 90.281 Restrictions on operational fixed stations in the 421-430 MHz band.

(a) Except for control stations, operational fixed facilities will not be authorized in the 421-430 MHz band. This does not preclude secondary fixed tone signaling and alarm operations authorized in § 90.235.

(b) Control stations associated with one or more mobile relay stations will be authorized only on the assigned frequency of the associated mobile station. Use of a mobile service frequency by a control station of a mobile relay system is subject to the condition that harmful interference shall not be caused to stations of licensees authorized to use the frequency for mobile service communications.

[52 FR 6158, Mar. 2, 1987, as amended at 54 FR 38681, Sept. 20, 1989]