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28 U.S. Code § 356 - Subpoena power

(a) Judicial Councils and Special Committees.—
In conducting any investigation under this chapter, the judicial council, or a special committee appointed under section 353, shall have full subpoena powers as provided in section 332(d).
(b) Judicial Conference and Standing Committees.—
In conducting any investigation under this chapter, the Judicial Conference, or a standing committee appointed by the Chief Justice under section 331, shall have full subpoena powers as provided in that section.