In this proceeding, we repurpose 45 megahertz of the 5.850-5.925 GHz band (the 5.9 GHz band) to allow for the expansion of unlicensed mid-band spectrum operations, while continuing to dedicate 30 megahertz of spectrum for vital intelligent transportation system (ITS) operations.  In addition, to promote the most efficient and effective use of this ITS spectrum, we are requiring the ITS service to use cellular vehicle-to-everything (C-V2X) based technology at the end of a transition period.  By splitting the 5.9 GHz band between unlicensed and ITS uses, today’s decision puts the 5.9 GHz band in the best position to serve the needs of the American public.

In the Further Notice, the Commission addresses issues remaining to finalize the restructuring of the 5.9 GHz band. Specifically, the Commission addresses: The transition of ITS operations in the 5.895- 5.925 GHz band from Dedicated Short Range Communications (DSRC) based technology to Cellular Vehicle-to-Everything (C-V2X) based technology; the codification of C-V2X technical parameters in the Commission's rules; other transition considerations; and the transmitter power and emissions limits, and other issues, related to full-power outdoor unlicensed operations across the entire 5.850-5.895 GHz portion of the 5.9 GHz band. The Commission modified the Further Notice released on November 20, 2020, with an Erratum released on December 11, 2020. The Commission released a Second Erratum on February 9, 2021. The corrections from these errata are included in this document.