15 CFR § 906.5 - Service.
(a) Service refers to providing documents to parties to an appeal.
(1) Service of documents may be made by first class mail (postage prepaid), facsimile, or commercial carrier, or by personal delivery to a party's address of record.
(2) Service of documents will be considered effective upon the date of postmark (or as otherwise shown for government-franked mail), facsimile transmission, delivery to a commercial carrier, or upon personal delivery.
(c) NAO may serve documents by electronic mail.