CALIFORNIA EVIDENCE: CIVIL AND CRIMINAL
...Privileges
......Official Information; Info Held by Govt
.........Official Information Priv
............Wiretap/Search Warrants
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Personal cellphone records obtained by search warrant are not subject to the California Public Records Act or the common law right of public access to court records.

The privileges and procedures of EC 1040 through 1042 apply to wiretap authorization affidavits as well as search warrants.