47 C.F.R. § 25.138
Earth Stations in the 3.7-4.2 GHz band
(a)-(b) [Reserved]
(c) Fixed and temporary fixed earth stations operating in the 3.7-4.16 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 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 (now ICFS) database on November 7, 2018; and
(3) Timely certified the accuracy of the information on file with the Commission by May 28, 2019.
(d) Fixed and temporary earth station licenses and registrations that meet the criteria in paragraph (c) of this section may be renewed or modified to maintain operations in the 4.16-4.2 GHz band.
(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.