47 CFR § 27.1424
Agreements between 3.7 GHz Service licensees and C-Band earth station operators
February 16, 2021
The PFD limits in §27.1423 may be modified by the private agreement of licensees of 3.7 GHz Service and entities operating earth stations in the 4000-4200 MHz band or TT&C operations in the 3700-3980 MHz band. A licensee of the 3.7 GHz Service who is a party to such an agreement must maintain a copy of the agreement in its station files and disclose it, upon request, to prospective license assignees, transferees, or spectrum lessees, and to the Commission.