; (ii) proof of service consisting of a statement by the person who made service certifying— (I) the date and manner of service; (II) the names of the persons served; and (III) their mail or electronic addresses, facsimile numbers, or the addresses of the places of delivery, as appropriate for the manner of service; or (iii) a statement indicating that service could not reasonably be completed. (D) Attorneys fees and costs Except as otherwise provided in this subsection, all parties to a petition shall bear their own attorney fees and costs. (5) Service of other documents Documents submitted or relied upon in a proceeding, other than the petition, shall be served in accordance with regulations established by the Commission. (6) Notification of right to opt out In order to effectuate service on a responding party, the petition shall notify the responding party of their right to opt out of the proceeding before the Board, and the consequences of opting out and not opting out, including a prominent statement that by not opting out the respondent— (A) loses the opportunity to have the dispute decided by a court created under article III of the Constitution of the United States