(a) If, in the opinion of the Commissioner of Banks, an examination conducted under G.S. 54C-55 fails to disclose the complete financial condition of a savings bank, the Commissioner of Banks may in order to ascertain its complete financial condition:
(1) Make an extended audit or examination of the savings bank or cause an audit or examination to be made by an independent auditor; and
(2) Make an extended revaluation of any of the assets or liabilities of the savings bank or cause an independent appraiser to make a revaluation.
(b) The Commissioner of Banks shall collect from the savings bank a reasonable sum for actual or necessary expenses of an audit, examination, or revaluation.