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PUBLIC LAW 90-351-JUNE 19, 1968
[82 STAT.
under this section by such officers, agents, or other persons as may be authorized or designated for that purpose by the Attorney General. "§ 2514. Immunity of witnesses "Whenever in the judgment of a United States attorney the testimony of any witness, or the production of books, papers, or other evidence by any witness, in any ca,se or proceeding before any grand jury or court of the United States involving any violation of this chapter or any of the offenses enumerated in section 2516, or any conspiracy to violate this chapter or any of the offenses enumerated in section 2516 is necessary to the public interest,.such United States attorney, upon the approval of the Attorney General, shall make application to the court that the witness shall be instructed to testify or produce evidence subject to the provisions of this section, and upon order of the court.such witness shall not be excused from testifying or from producing books, papers, or other evidence on the ground that the testimony or evidence required of him may tend to incriminate him or subject him to a penalty or forfeiture. No such witness shall be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction, matter or thing concerning which he is compelled, after having claimed his privilege against self-incrimination, to testify or produce evidence, nor shall testimony so compelled be used as evidence in any criminal proceeding (except in a proceeding described in the next sentence) against him in any court. No witness shall be exempt under this section from pro,secution for perjury or contempt committed while giving testimony or producing evidence under compulsion as provided in this section. "§ 2515. Prohibition of use as evidence of intercepted wire or oral communications "Whenever any wire or oral communication has been intercepted, no part of the contents of such communication and no evidence derived therefrom may be received in evidence in any trial, hearing, or other proceeding in or before any court, grand jury, department, officer, agency, regulatory body, legislative committee, or other authority of the United States, a State, or a political subdivision thereof if the disclosure of that information would be in violation of this chapter. "§ 2516. Authorization for interception of wire or oral communications "(1) The Attorney General, or any Assistant Attorney General specially designated by the Attorney General, may authorize an application to a Federal judge of competent jurisdiction for, and such judge may grant in conformity with section 2518 of this chapter an order authorizing or approving the interception of wire or oral communications by the Federal Bureau of Investigation, or a Federal agency having responsibility for the investigation of the offense as to which the application is made, Avhen such interception may provide or has provided evidence of— " (a) any offense punishable by death or by imprisonment for more than one year under sections 2274 through 2277 of title 42 of the United States Code (relating to the enforcement of the 68 Stat. 958. Atomic Energy Act of 1954), or under the following chapters of 68^813^^2^16^' ^^^^ title: chapter 37 (relating to espionage), chapter 105 (relat62 Stat! 807;' ing to Sabotage), chapter 115 (relating to treason), or chapter 102 Ante, p. 75. (relating to riots); "(b) a violation of section 186 or section 501(c) of title 29, 73^stat°535^^537 United States Code (dealing with restrictions on payments and loans to labor organizations), or any offense which involves mur-
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