StacksVerified U.S. regulatory reference

47 CFR §30.407

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
In the 27,500-28,350 MHz band, system operators are permitted to use any polarization within its service area, but only vertical and/or horizontal polarization for antennas located within 20 kilometers of the outermost edge of their service area.