By not less than a two-thirds (2/3) vote of the members of its board of directors and with the approval of the Insurance Commissioner, a mutual insurer may abandon a plan of reorganization at any time before the issuance of the certificate of authority by the commissioner. Upon such abandonment, all rights and obligations arising out of the plan of reorganization shall terminate, and the mutual insurer shall continue to conduct its business as a domestic mutual insurer as though no plan of reorganization had ever been adopted.