Tennessee Code Title 8. Public Officers and Employees § 8-27-403

(a) The county mayor or a delegated committee of the governing body may prepare and present to the governing body for approval a contract or contracts with one (1) or more insurance companies or other corporations which may exist under title 56, chapter 27, 28, or 29 authorized to do business in the state of Tennessee, or to one (1) or more insurance trusts which have contracted with an insurance company or companies or corporations, as set out above, authorized to do business in this state for a policy or policies of group insurance to provide for the payment of group life, hospitalization, disability, or medical expenses for designated county employees. Such approval shall be by majority vote of the governing body and shall be executed in the name of the county. Such contracts may from time to time be amended, modified, or changed by majority vote of the governing body.

(b) The policy or policies shall conform to the standard provisions of group insurance policies as set forth in this code.

(c) In any county having a population of not less than one hundred seven thousand one hundred (107,100) nor more than one hundred seven thousand two hundred (107,200), according to the 2000 federal census or any subsequent federal census, the provisions and requirements of the County Purchasing Law of 1957, compiled in title 5, chapter 14, part 1, shall not apply to the county mayor or any delegated committee of the governing body either responsible for presentment or approval of a contract pursuant to this part.