31.26—Filing, form, and service of papers.

(b) Service. A party filing a document shall, at the time of filing, serve a copy of such document on every other party. Service upon any party of any document other than those required to be served as prescribed in § 31.8 shall be made by delivering a copy, or by placing a copy of the document in the United States mail, postage prepaid and addressed, to the party's last known address. When a party is represented by a representative, service shall be made upon such representative in lieu of the actual party.
[53 FR 881, Jan. 14, 1988, as amended at 73 FR 33329, June 12, 2008]