(a)
If a peace officer or federal law enforcement officer, while engaged in intercepting wire or electronic communications in the manner authorized by this chapter, intercepts wire or electronic communications relating to crimes other than those specified in the order of authorization, but which are enumerated in subdivision (a) of Section 629.52, or any violent felony as defined in subdivision (c) of Section 667.5, (1) the contents thereof, and evidence derived therefrom, may be disclosed or used as provided in Sections 629.74 and 629.76 and (2) the contents and any evidence derived therefrom may be used under Section 629.78 when authorized by a judge if the judge finds, upon subsequent application, that the contents were otherwise intercepted in accordance with the provisions of this chapter. The application shall be made as soon as practicable.(b)
If a peace officer or federal law enforcement officer, while engaged in intercepting wire or electronic communications in the manner authorized by this chapter, intercepts wire or electronic communications relating to crimes other than those specified in subdivision (a), the contents thereof, and evidence derived therefrom, may not be disclosed or used as provided in Sections 629.74 and 629.76, except to prevent the commission of a public offense. The contents and any evidence derived therefrom may not be used under Section 629.78, except where the evidence was obtained through an independent source or inevitably would have been discovered, and the use is authorized by a judge who finds that the contents were intercepted in accordance with this chapter.(c)
The use of the contents of an intercepted wire or electronic communication relating to crimes other than those specified in the order of authorization to obtain a search or arrest warrant entitles the person named in the warrant to notice of the intercepted wire or electronic communication and a copy of the contents thereof that were used to obtain the warrant.
Source:
Section 629.82, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PEN§ionNum=629.82..