Section 22.7 - Copies and Service Thereof [Rule 7](a)Rule 4 file. For documents provided pursuant to § 22.4 of this part [Rule 4], the original and one copy shall be provided to the Board, and one copy shall be provided to each party. Documents shall be provided by hand delivery, express or priority mail, or approved commercial carrier (e.g., UPS or FedEx); first class and parcel post mail are not permitted unless authorized by the Board.(b)Other submissions filed with the Board. Except as otherwise authorized by the Board, all correspondence and submissions, other than documents provided pursuant to § 22.4 of this part [Rule 4] and appeals filed under § 22.3(c) of this part [Rule 3(c)], shall be provided to the Board by e-mail at cab@gao.gov, with a courtesy copy of the submission provided by e-mail to each of the members of the Board. All e-mails to cab@gao.gov must identify the case name and docket number in the subject line of the e-mail. In addition, unless the Board directs otherwise, the original plus 3 copies of the e-mailed submission also shall be provided to the Board by hand delivery, express or priority mail, or approved commercial carrier (e.g., UPS or FedEx) within 2 business days of the e-mailed filing (except that the original and one copy are required for appeals involving small claims or using accelerated procedures). Delivery to the Board by first class or parcel post mail is not permitted. However, the Board may at any time modify the number of copies required or authorize alternative methods of delivery to the Board.(c)Service on parties. All correspondence and submissions to the Board must be provided to all other parties using the same method of service as used for the Board, or an equal or more expeditious method of service. Except for documents provided pursuant to § 22.4 of this part [Rule 4], e-mail service is preferred. However, where the parties agree to other methods of service, such other methods of service to parties are permitted.(d)Proof of service. A party sending a document to the Board must represent to the Board that a copy has been sent to the other parties, identify the date on which service was made, and identify the method of delivery used. This may be done by certificate of service, by notation of a photostatic copy (cc:), or by any other means that can reasonably be expected to show the Board that the other party has been provided a copy, the date on which the copy was provided, and the method of delivery used to provide the copy. Proof of service must be provided to the Board at the time of filing. If proof of service is not provided, the Board may decline to consider the document in the appeal.