Tenn. Code Ann. § 8-22-107: Items paid for by county - Special provisions for certain counties

(a) All necessary books, stationery, office equipment, stamps, and supplies of all kinds used in the conduct of the various offices shall be furnished and paid for by the county, including premiums on official bonds executed by the officers named in § 8-22-101 .

(b) Notwithstanding subsection (a), in counties with a population of six hundred thousand (600,000) or more, according to the 1970 federal census or any subsequent census, all necessary books, stationery, office equipment, stamps and supplies of all kinds used in the conduct of the various offices of the elected county officers enumerated in this chapter shall be furnished and paid for by the county, including premiums on official bonds executed by such officers named in § 8-22-101 , and all such purchases shall be accomplished through a centralized purchasing procedure in that county pursuant to the applicable laws relative to that county for purchasing. No official or officer enumerated in § 8-22-101 shall be entitled to purchase any of the aforementioned items for the officer's office by using the fees, commissions or emoluments collected by the officer.