All papers to be filed under the regulations in this part may be reproduced by printing or by any other process, provided the copies are clear and legible; shall be dated, the original signed in ink, and shall show the docket description and title of the proceeding, and the title, if any, and address of the signatory. If typewritten, the impression shall be on only one side of the paper and shall be double spaced, except that quotations shall be single spaced and indented. Documents not printed, except correspondence and exhibits, should be on strong, durable paper and shall not be more than 8 1/2 inches wide and 12 inches long, with a left margin 1 1/2 inches wide. Printed documents shall be printed in clear type (never smaller than pica or 11-point type) adequately leaded, and the paper shall be opaque and unglazed. Briefs, if printed, shall be printed on paper not less than 6 1/8 inches wide and 9 1/4 inches long, with inside margin not less than 1 inch wide. All briefs over 15 pages shall contain a subject index with page references and a list of authorities cited.

(a) Documents filed shall be subscribed: (1) By the person or persons filing same, (2) by an officer thereof if it be a corporation, (3) by an officer or employee if it be a government instrumentality, or (4) by an attorney or other person having authority with respect thereto.

(b) Documents submitted pursuant to stipulation of counsel where no sponsoring witness will be used must be verified.

All documents, when tendered for filing should show that service has been made upon all parties to the proceeding. Such service shall be made by delivering one copy to each party in person or by mailing by first-class mail properly addressed with postage prepaid. When a party has appeared by attorney or other representative, service upon such attorney or other representative will be deemed service upon the party. All documents served by mail preferably should be mailed in sufficient time to reach the parties on the date on which the original is due to be filed and should be air mailed if addressee is more than 300 miles distant.

The date of service of documents shall be the day when the matter served is deposited in the United States mail, shown by the postmark thereon, or is delivered in person, as the case may be.

The original of every document filed with the Administration and required to be served upon all parties to a proceeding shall be accompanied by a certificate of service signed by the party making service, stating that such service has been made upon each party to the proceeding. Certificates of service may be in substantially the following form:

Except as otherwise provided in the regulations in this part, an original and fifteen copies of every document shall be filed for use of the Administration, except written testimony and exhibits to be made a part of a record, which shall be filed in triplicate unless otherwise directed.