U.S. Code of Federal Regulations

Regulations most recently checked for updates: Dec 14, 2025

All TitlesTitle 47Chapter IPart 27Subpart C - Subpart C—Technical Standards
§ 27.50 - Power limits and duty cycle.
§ 27.51 - Equipment authorization.
§ 27.52 - RF exposure.
§ 27.53 - Emission limits.
§ 27.54 - Frequency stability.
§ 27.55 - Power strength limits.
§ 27.56 - Antenna structures; air navigation safety.
§ 27.57 - International coordination.
§ 27.58 - Interference to BRS/EBS receivers.
§§ 27.59-27.62 - §[Reserved]
§ 27.64 - Protection from interference.
§ 27.65 - Acceptance of interference in 2000-2020 MHz.
§ 27.66 - Discontinuance, reduction, or impairment of service.
§ 27.70 - Information exchange.
§ 27.72 - Information sharing requirements.
§ 27.73 - WCS, AMT, and Goldstone coordination requirements.
§ 27.75 - Basic interoperability requirement.
§ 27.77 - Restriction on mobile and portable equipment in the 1695-1710 MHz and 1755-1780 MHz bands.
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