47 CFR § 87.423 - Hours of operation.

---
identifier: "/us/cfr/t47/s87.423"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 87.423 - Hours of operation."
title_number: 47
title_name: "Telecommunication"
section_number: "87.423"
section_name: "Hours of operation."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "D"
subchapter_name: "SAFETY AND SPECIAL RADIO SERVICES"
part_number: "87"
part_name: "AVIATION 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, 303 and 307(e), unless otherwise noted."
regulatory_source: "53 FR 28940, Aug. 1, 1988, unless otherwise noted."
cfr_part: "87"
---


# 87.423 Hours of operation.

The control tower must render a communications service 24 hours a day unless the Commission determines, in coordination with the NTIA IRAC, that reduced hours of service will not adversely affect life and property in the air.

[63 FR 68958, Dec. 14, 1998]