(1) Number of copies. Unless otherwise specifically provided, an original and one conformed copy of all documents filed with the Commission in accordance with the provisions of this part must be filed with the Proceedings Clerk.

(2) Title page. All documents filed with the Proceedings Clerk must include at the head thereof, or on a title page, the name of the Commission, the title of the proceeding, the docket number (if one has been assigned by the Proceedings Clerk), the subject of the particular document and the name of the person on whose behalf the document is being filed.

(3) Paper, spacing, type. All documents filed with the Proceedings Clerk must be typewritten, must be on one grade of good white paper no less than 8 or more than 81⁄2 inches wide and no less than 101⁄2 or more than 111⁄2 inches long, and must be bound on the top only. They must be double-spaced, except for long quotations (3 or more lines) and footnotes which should be single-spaced.

(4) Signature. The original copy of all papers must be signed in ink by the person filing the same or by his or her duly authorized agent or attorney.

(1) General requirements. All documents filed with the Proceedings Clerk must, at or before the time of filing, be served upon all parties. A party must use a means of service which is at least as expeditious as that used in filing that document with the Proceedings Clerk. One copy of all motions, petitions or applications made in the course of the proceeding, all notices of appeal, all briefs, and letters to the Commission or an employee thereof must be served by a party upon all other parties.

(2) Manner of service. Service may be either personal or by mail. Service by mail is complete upon deposit of the document in the mail. Where service is effected by mail, the time within which the person served may respond thereto will be increased by three days.

(3) Designation of person to receive service. The first document filed in a proceeding by or on behalf of any party must state on the first page the name and postal address of the person who is authorized to receive service for the party of all documents filed in the proceeding. Thereafter, service of documents must be made upon the person authorized unless service on a different authorized person or on the party himself or herself is ordered by the Commission, or unless pursuant to § 9.8 the person authorized is changed by the party upon due notice to all other parties. Parties must file and serve notification of any changes in the information provided pursuant to this subparagraph as soon as practicable after the change occurs.