; and (2) 2 members representing the public, appointed by the President on notification of the establishment of the special board of inquiry. (b) Qualifications and conflicts of interest The public members of a special board of inquiry must be qualified by training and experience to participate in the inquiry and may not have a pecuniary interest in an aviation enterprise involved in the incident to be investigated. (c) Authority A special board of inquiry has the same authority that the Board has under this Act. 4. Administrative (a) General authority (1) The Board, and when authorized by it, a member of the Board, an administrative law judge employed by or assigned to the Board, or an officer or employee designated by the Chairman of the Board, may conduct hearings to carry out this Act, administer oaths, and require, by subpoena or otherwise, necessary witnesses and evidence. (2) A witness or evidence in a hearing under paragraph (1) of this subsection may be summoned or required to be produced from any place in the United States to the designated place of the hearing. A witness summoned under this subsection is entitled to the same fee and mileage the witness would have been paid in a court of the United States. (3) A subpoena shall be issued under the signature of the Chairman or the Chairman’s delegate but may be served by any person designated by the Chairman. (4) If a person disobeys a subpoena, order, or inspection notice of the Board, the Board may bring a civil action in a district court of the United States to enforce the subpoena, order, or notice. An action under this paragraph may be brought in the judicial district in which the person against whom the action is brought resides, is found, or does business. The court may punish a failure to obey an order of the court to comply with the subpoena, order, or notice as a contempt of court. (b) Additional powers (1) The Board may— (A) procure the temporary or intermittent services of experts or consultants under section 3109 of title 5, United States