Tennessee Code Title 9. Public Finances § 9-4-109

(a) Parts 1, 3 and 5 of this chapter apply to the deposit of all public funds by counties and municipalities including, but not limited to, those deposited under §§ 5-8-201, 5-8-207, 5-8-301(b)(2), 6-4-402, 6-22-120, 6-35-313, 6-56-106, and 6-56-110. No private act shall provide for the deposit or security for public funds in any manner or under any terms other than that provided in this chapter.

(b) For the purpose of carrying out this section, any reference to the state treasurer or any other state official in this part and part 4 of this chapter is deemed to mean the county or municipal official charged with the deposit of county or municipal funds, and shall not require the state treasurer nor any other state official to perform any deposit, collateral nor safekeeping services on behalf of the local government.