All life insurance and all disability insurance in connection with loans or other credit transactions shall be subject to the provisions of this chapter; except, that insurance in connection with a loan or other credit transaction of more than fifteen (15) years duration shall not be subject to this chapter, nor shall insurance be subject to this chapter where the issuance of such insurance is an isolated transaction on the part of the insurer not related to an agreement or a plan for insuring debtors of the creditor.