Cross-complaints seeking any relief within the jurisdiction of the Commission against any party (complainant or defendant) to that proceeding are prohibited. Any claim that might otherwise meet the requirements of a cross-complaint may be filed as a separate complaint in accordance with §§ 1.720 through 1.740 . For purposes of this subpart, the term "cross-complaint" shall include counterclaims.
47 C.F.R. §1.727