Cal. Insurance Code § 925.1

(a) All supplemental information, work papers and other relevant documents of the independent certified public accountant, or independent actuary, or other independent professional financial person and the insurer relevant to information provided to the commissioner pursuant to Sections 925 to 925.2, inclusive, shall be made available by the insurer for review by the commissioner upon request at the insurer’s office, at the commissioner’s office, or any other reasonable place designated by the commissioner. (b) All supplemental information, relevant work papers and other relevant documents of the certified public accountant or actuary shall be retained for a period of not less than five years from the date of the report. The certified public accountant or the actuary shall make that information available to the insurer upon the reasonable request of the commissioner made to the insurer, except when that information is subject to the right against self-incrimination or other relevant privileges. (c) Every insurer shall authorize, in writing, the independent certified public accountant, independent actuary, or other independent professional financial person retained or engaged by it to provide to the commissioner all information subject to Section 925 to 925.2, inclusive.