(a) Title. Documents in any proceeding under part 458 of this subchapter, including correspondence, shall show the title of the proceeding and the case number, if any.

(b) Signature. The original of each document required to be filed under these regulations shall be signed by the party or by an attorney or representative of record for the party, or by an officer of the party, and shall contain the address and telephone number of the person signing it.