StacksVerified U.S. regulatory reference

47 CFR §87.423

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.