47 CFR §88.109
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Transmitters operating in the 5030-5091 MHz band must comply with the time division duplex (TDD) frame structure and timing accuracy requirements specified in technical standard RTCA DO-362A (incorporated by reference, see § 88.117) sections 2.2.1.3 and 2.2.1.3.1.