Section 1308.31 - Filing and service(a) All documents required to be served shall be served on TVA and Contractor and filed with the Board, except subpoenas.(b) A request under § 1308.15 shall be directed to the General Manager, Tennessee Valley Authority, 400 Commerce Avenue, Knoxville, Tennessee 37902, and shall be transmitted to the Chairman.(c) All other documents required to be filed shall be directed to the Hearing Officer assigned to the matter.(d) Service on the opposing party may be made personally or by mail. The copy presented for filing shall bear an appropriate certificate or acknowledgment of service.