CFR > Title 47 > Chapter I > Subchapter D > Part 90 > Subpart O > Internal Transmitter Control Systems CFR > Title 47 > Chapter I > Subchapter D > Part 90 > Subpart O > Internal Transmitter Control Systems Current as of: 2024 | Check for updates | Other versions § 90.471 Points of operation in internal transmitter control systems § 90.473 Operation of internal transmitter control systems through licensed fixed control points § 90.475 Operation of internal transmitter control systems in specially equipped systems