This chapter does not apply to:

(1) The United States or any department or agency of the United States;
(2) The state of Tennessee or any political subdivision of the state;
(3) Banks, trust companies, credit unions, building and loan associations, savings and loan associations, savings banks or mutual banks organized under the laws of any state or the United States; and
(4) Transactions governed by title 56, or the rules and regulations promulgated solely under title 56.