18 U.S.C. 2517.

§ 2517. Authorization for disclosure and use of intercepted wire, oral, or electronic communications

(1) Any investigative or law enforcement officer who, by any means authorized by this chapter, has obtained knowledge of the contents of any wire, oral, or electronic communication, or evidence derived therefrom, may disclose such contents to another investigative or law enforcement officer to the extent that such disclosure is appropriate to the proper performance of the official duties of the officer making or receiving the disclosure.

(2) Any investigative or law enforcement officer who, by any means authorized by this chapter, has obtained knowledge of the contents of any wire, oral, or electronic communication or evidence derived therefrom may use such contents to the extent such use is appropriate to the proper performance of his official duties.

(3) Any person who has received, by any means authorized by this chapter, any information concerning a wire, oral, or electronic communication, or evidence derived therefrom intercepted in accordance with the provisions of this chapter may disclose the contents of that communication or such derivative evidence while giving testimony under oath or affirmation in any proceeding held under the authority of the United States or of any State or political subdivision thereof.

(4) No otherwise privileged wire, oral, or electronic communication intercepted in accordance with, or in violation of, the provisions of this chapter shall lose its privileged character.

(5) When an investigative or law enforcement officer, while engaged in intercepting wire, oral, or electronic communications in the manner authorized herein, intercepts wire, oral, or electronic communications relating to offenses other than those specified in the order of authorization or approval, the contents thereof, and evidence derived therefrom, may be disclosed or used as provided in subsections (1) and (2) of this section. Such contents and any evidence derived therefrom may be used under subsection (3) of this section when authorized or approved by a judge of competent jurisdiction where such judge finds on subsequent application that the contents were otherwise intercepted in accordance with the provisions of this chapter. Such application shall be made as soon as practicable.

(6) Any investigative or law enforcement officer, or attorney for the Government, who by any means authorized by this chapter, has obtained knowledge of the contents of any wire, oral, or electronic communication, or evidence derived therefrom, may disclose such contents to any other Federal law enforcement, intelligence, protective, immigration, national defense, or national security official to the extent that such contents include foreign intelligence or counterintelligence (as defined in section 3 of the National Security Act of 1947 (> 50 U.S.C. 401a)), or foreign intelligence information (as defined in subsection (19) of section 2510 of this title), to assist the official who is to receive that information in the performance of his official duties. Any Federal official who receives information pursuant to this provision may use that information only as necessary in the conduct of that person's official duties subject to any limitations on the unauthorized disclosure of such information.

(7) Any investigative or law enforcement officer, or other Federal official in carrying out official duties as such Federal official, who by any means authorized by this chapter, has obtained knowledge of the contents of any wire, oral, or electronic communication, or evidence derived therefrom, may disclose such contents or derivative evidence to a foreign investigative or law enforcement officer to the extent that such disclosure is appropriate to the proper performance of the official duties of the officer making or receiving the disclosure, and foreign investigative or law enforcement officers may use or disclose such contents or derivative evidence to the extent such use or disclosure is appropriate to the proper performance of their official duties.

(8) Any investigative or law enforcement officer, or other Federal official in carrying out official duties as such Federal official, who by any means authorized by this chapter, has obtained knowledge of the contents of any wire, oral, or electronic communication, or evidence derived therefrom, may disclose such contents or derivative evidence to any appropriate Federal, State, local, or foreign government official to the extent that such contents or derivative evidence reveals a threat of actual or potential attack or other grave hostile acts of a foreign power or an agent of a foreign power, domestic or international sabotage, domestic or international terrorism, or clandestine intelligence gathering activities by an intelligence service or network of a foreign power or by an agent of a foreign power, within the United States or elsewhere, for the purpose of preventing or responding to such a threat. Any official who receives information pursuant to this provision may use that information only as necessary in the conduct of that person’s official duties subject to any limitations on the unauthorized disclosure of such information, and any State, local, or foreign official who receives information pursuant to this provision may use that information only consistent with such guidelines as the Attorney General and Director of Central Intelligence shall jointly issue.