As used in this chapter—

((1)) “agency of the United States” means any executive department as defined in , United States Code, a military department as defined in , United States Code, the Nuclear Regulatory Commission, the Board of Governors of the Federal Reserve System, the China Trade Act registrar appointed under (15 U.S.C. sec. 143), the Commodity Futures Trading Commission, the Federal Communications Commission, the Federal Deposit Insurance Corporation, the Federal Maritime Commission, the Federal Power Commission, the Federal Trade Commission, the Surface Transportation Board, the National Labor Relations Board, the National Transportation Safety Board, the Railroad Retirement Board, an arbitration board established under (45 U.S.C. sec. 157), the Securities and Exchange Commission, or a board established under (15 U.S.C. sec. 715d);

((2)) “other information” includes any book, paper, document, record, recording, or other material;

((3)) “proceeding before an agency of the United States” means any proceeding before such an agency with respect to which it is authorized to issue subpenas and to take testimony or receive other information from witnesses under oath; and

((4)) “court of the United States” means any of the following courts: the Supreme Court of the United States, a United States court of appeals, a United States district court established under chapter 5, title 28, United States Code, a United States bankruptcy court established under chapter 6, title 28, United States Code, the District of Columbia Court of Appeals, the Superior Court of the District of Columbia, the District Court of Guam, the District Court of the Virgin Islands, the United States Court of Federal Claims, the Tax Court of the United States, the Court of International Trade, and the Court of Appeals for the Armed Forces.