(1) The commissioner shall make such investigation as he or she deems necessary or convenient for proper determination regarding an appeal.
(2) The books, accounts, papers and records of every fire protection classification advisory organization or insurer which makes its own rates, operating in the Commonwealth, shall be available to the commissioner for inspection and examination. By notice and order, the commissioner may require their production or the production of verified copies at such time and place as he or she designates, any expense incurred to be borne by the rating organization or insurer so ordered.