In any statutory proceeding conducted under section 3005(a), the Judicial Officer may require by subpoena the attendance and testimony of witnesses and the production of any records (including books, papers, documents, and other tangible things which constitute or contain evidence) which the Judicial Officer considers relevant or material to such proceeding.

Nothing in paragraph (2) shall be considered to apply in any circumstance to which paragraph (1) applies.

A subpoena issued under this section may be served by a person designated under section 3061 of title 18 at any place within the territorial jurisdiction of any court of the United States.

Any such subpoena may be served upon any person who is not to be found within the territorial jurisdiction of any court of the United States, in such manner as the Federal Rules of Civil Procedure prescribe for service in a foreign country. To the extent that the courts of the United States may assert jurisdiction over such person consistent with due process, the United States District Court for the District of Columbia shall have the same jurisdiction to take any action respecting compliance with this section by such person that such court would have if such person were personally within the jurisdiction of such court.

A verified return by the individual serving any such subpoena setting forth the manner of such service shall be proof of such service. In the case of service by registered or certified mail, such return shall be accompanied by the return post office receipt of delivery of such subpoena.

Whenever any person, partnership, corporation, association, or entity fails to comply with any subpoena duly served upon him, the Postmaster General may request that the Attorney General seek enforcement of the subpoena in the district court of the United States for any judicial district in which such person resides, is found, or transacts business, and serve upon such person a petition for an order of such court for the enforcement of this section.

Whenever any petition is filed in any district court of the United States under this section, such court shall have jurisdiction to hear and determine the matter so presented, and to enter such order or orders as may be required to carry into effect the provisions of this section. Any final order entered shall be subject to appeal under section 1291 of title 28, United States Code. Any disobedience of any final order entered under this section by any court may be punished as contempt.