Cal. Penal Code § 629.78

Any person who has received, by any means authorized by this chapter, any information concerning a wire or electronic communication, or evidence derived therefrom, intercepted in accordance with the provisions of this chapter, may, pursuant to Section 629.82, disclose the contents of that communication or derivative evidence while giving testimony under oath or affirmation in any criminal court proceeding or in any grand jury proceeding, or in an administrative or disciplinary hearing involving the employment of a peace officer.