An organization having a certificate of authority under this Act may borrow or assume a liability for the repayment of a sum of money upon a written agreement that the loan or advance with interest thereon not exceeding a reasonable rate shall be repaid only out of net worth of the organization in excess of such minimum net worth as is stipulated in and by the agreement. The agreement shall first be submitted to and approved by the appropriate authoritative body of the organization and the Director. Repayment of principal or payment of interest may be made only with the approval of the Director when he is satisfied that the financial condition of the organization warrants such action, but such approval may not be withheld if the organization shall have and submit satisfactory evidence of net worth of not less than the amount stipulated in the repayment of principal or interest payment clause of the agreement. No loan or advance made under this Section or interest accruing thereon shall form a part of the legal liabilities of the organization until authorized for payment by the Director, but until such authorization all statements published by the organization or filed with the Director shall show the amount thereof then remaining unpaid as a special surplus account. Nothing in this Section shall be construed to mean that an organization may not otherwise borrow money, but the amount so borrowed with accrued interest thereon shall be carried by the company as a liability.