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

The applicant may be required to submit such additional documents and written statements of fact, signed and verified (or affirmed), as in the judgment of the Commission (or the presiding officer, if the application has been designated for hearing) may be necessary. Any additional documents and written statements of fact required in connection with applications under Title II of the Communications Act need not be verified (or affirmed).

Except as otherwise expressly provided in this chapter, all pleadings filed in a hearing proceeding shall be served upon all other counsel in the proceeding or, if a party is not represented by counsel, then upon such party. All such papers shall be accompanied by proof of service. For provisions governing the manner of service, see §1.47.

Unless offered for the sole purpose of attempting to prove or demonstrate sound effect, mechanical or physical reproductions of sound waves shall not be admitted in evidence. Any party desiring to offer any matter alleged to be contained therein or thereupon shall have such matter typewritten on paper of the size prescribed by §1.49, and the same shall be identified and offered in duplicate in