((a)) In each judicial district there may be not more than three prize commissioners, one of whom is the naval prize commissioner. They shall be appointed by the district court for service in connection with any prize cause in which proceedings are brought under section 8853(a) or (c) of this title. The naval prize commissioner must be an officer of the Navy whose appointment is approved by the Secretary of the Navy. The naval prize commissioner shall protect the interests of the Department of the Navy in the prize property. At least one of the other commissioners must be a member of the bar of the court, of not less than three years’ standing, who is experienced in taking depositions.

((b)) A district court may appoint special prize commissioners to perform abroad, in connection with any prize cause in which proceedings are brought under , the duties prescribed for prize commissioners, and, in connection with those causes, to exercise anywhere such additional powers and perform such additional duties as the court considers proper, including the duties prescribed by this chapter for United States marshals. The court may determine the number and qualifications of the special prize commissioners it appoints, except that for each cause there shall be at least one naval special prize commissioner. The naval special prize commissioner must be an officer of the Navy whose appointment is approved by the Secretary. The naval special prize commissioner shall protect the interests of the Department of the Navy in the prize property.