California Code, Penal Code - PEN § 964

(a) In each county, the district attorney and the courts, in consultation with any local law enforcement agencies that may desire to provide information or other assistance, shall establish a mutually agreeable procedure to protect confidential personal information regarding any witness or victim contained in a police report, arrest report, or investigative report if one of these reports is submitted to a court by a prosecutor in support of a criminal complaint, indictment, or information, or by a prosecutor or law enforcement officer in support of a search warrant or an arrest warrant.

(b) For purposes of this section, “confidential personal information” includes, but is not limited to, an address, telephone number, driver's license or California Identification Card number, social security number, date of birth, place of employment, employee identification number, mother's maiden name, demand deposit account number, savings or checking account number, or credit card number.