All state savings banks must obtain and maintain insurance on all members' and customers' deposit accounts from an insurance corporation created by an act of Congress. Prior to the licensing of a savings bank, a certificate of incorporation duly recorded under the provisions of Section 81-19-67(3) shall be deemed to be sufficient certification to the insurance corporation that must be obtained within the time limit prescribed hereinafter. Subject to the rules and regulations of the commissioner, a state savings bank may obtain or participate in efforts to obtain insurance of deposits that is in excess of the amount eligible for federal insurance of accounts. Such insurance shall be known as "excess insurance."