All supplemental information provided or made available to the commissioner pursuant to Sections 925 to 925.2, inclusive, including work papers and other relevant documents of the independent certified public accountants or, independent actuary or other independent professional financial person and the insurer relevant to that information, shall be received in confidence within the meaning of subdivision (d) of Section 6254 of the Government Code and exempt from the California Public Records Act (Chapter 3.5 (commencing with Section 6250) of Division 7 of Title 1 of the Government Code). Additionally, that information shall not be subject to subpoena or subpoena duces tecum.