Tennessee Code Title 2. Elections § 2-20-105

(a) At the request of a county election commission, the state coordinator of elections shall provide to the commission necessary assistance and guidance in the selection of a precinct-based optical scanner pursuant to the requirements of this chapter. To the extent federal funding through the Help America Vote Act (HAVA), compiled generally in 42 U.S.C. §§ 15301 et seq., remains available for the cost of purchasing or leasing any new precinct-based optical scanners, the coordinator shall provide financial assistance for purchasing or leasing such machines.