A. Upon any liquidation of a domestic mutual insurer its assets remaining after discharge of its indebtedness, policy obligations, repayment of contributed or borrowed surplus, if any, and expense of administration shall be distributed to currently existing persons who had been members of the insurer for at least one year and who were its members at any time within thirty-six (36) months next preceding the date such liquidation was authorized or ordered, or the date of the last termination of the insurer’s certificate of authority in this state, whichever date is the earlier; except that if the superintendent believes that the insurer’s management has caused or encouraged reduction of the number or changed the identity of members of the insurer in anticipation of liquidation he may enlarge the thirty-six (36) month qualification period as he may deem reasonable.

B. The insurer shall make a reasonable classification of its policies held by such members and a formula based upon such classification and premiums earned for determination of the distributive share of each member participating in the distribution of assets. The classification and formula shall be subject to the superintendent’s approval.