(a) Authority to issue

The Secretary shall have power to subpoena the attendance and testimony of any witness, and the production of all documentary evidence relating to the administration or enforcement of this chapter or any matter under investigation in connection with this chapter.

(b) Location of production

The attendance of any witness and production of documentary evidence may be required from any place in the United States at any designated place of hearing.

(c) Enforcement of Subpoena

In the case of disobedience to a subpoena by any person, the Secretary may request the Attorney General to invoke the aid of any court of the United States within the jurisdiction in which the investigation is conducted, or where the person resides, is found, transacts business, is licensed to do business, or is incorporated, in requiring the attendance and testimony of any witness and the production of documentary evidence. In case of a refusal to obey a subpoena issued to any person, a court may order the person to appear before the Secretary and give evidence concerning the matter in question or to produce documentary evidence. Any failure to obey the court's order may be punished by the court as a contempt of the court.

(d) Compensation

Witnesses summoned by the Secretary shall be paid the same fees and mileage that are paid to witnesses in courts of the United States, and witnesses whose depositions are taken and the persons taking the depositions shall be entitled to the same fees that are paid for similar services in the courts of the United States.

(e) Procedures

The Secretary shall publish procedures for the issuance of subpoenas under this section. Such procedures shall include a requirement that subpoenas be reviewed for legal sufficiency and signed by the Secretary. If the authority to sign a subpoena is delegated, the agency receiving the delegation shall seek review for legal sufficiency outside that agency.

(f) Scope of subpoena

Subpoenas for witnesses to attend court in any judicial district or to testify or produce evidence at an administrative hearing in any judicial district in any action or proceeding arising under this chapter may run to any other judicial district