California Code, Vehicle Code - VEH § 1808.9

(a) Except for retired peace officers whose home address is permanently withheld from public inspection under subdivision (c) of Section 1808.4 or subdivision (c) of Section 1808.6, a person whose home address is confidential in any record of the department under Section 1808.2, 1808.4, or 1808.6 may be required by the department to demonstrate his or her continued eligibility for that confidentiality upon renewal of a driver's license or identification card issued by the department.  Not later than 90 days prior to the expiration of a driver's license or identification card, the department shall notify the person whose record is confidential of any requirement to demonstrate the continued eligibility.

(b) A person whose driver's license or identification card is renewed within one year of the first request for address confidentiality under this section shall not be required to demonstrate his or her eligibility for that confidentially again until the subsequent renewal.