47 CFR § 25.138 - Earth Stations in the 3.7-4.2 GHz band.
(a) Applications for new, modified, or renewed earth station licenses and registrations in the 3.7-4.0 GHz portion of the band in CONUS are no longer accepted.
(b) Applications for new earth station licenses or registrations within CONUS in the 4.0-4.2 GHz portion of the band will not be accepted until the transition is completed and upon announcement by the International Bureau via Public Notice that applications may be filed.
(c) Fixed and temporary fixed earth stations operating in the 3.7-4.0 GHz portion of the band within CONUS will be protected from interference by licensees in the 3.7 GHz Service subject to the deadlines set forth in § 27.1412 of this chapter and are eligible for transition into the 4.0-4.2 GHz band so long as they:
(1) Were operational as of April 19, 2018 and continue to be operational;
(2) Were licensed or registered (or had a pending application for license or registration) in the IBFS database on November 7, 2018; and
(3) Timely certified the accuracy of the information on file with the Commission by May 28, 2019.
(e) Applications for new, modified, or renewed licenses and registrations for earth stations outside CONUS operating in the 3.7-4.2 GHz band will continue to be accepted.