Tennessee Code Title 12. Public Property, Printing and Contracts § 12-3-1201

(a) The central procurement office may, upon request, purchase goods and services for any county, city, municipality, special district, school district, other local governmental unit of the state, or quasi-governmental entity organized under a city, municipality, or county. The purchases shall be made on the same terms and under the same rules and regulations as now provided for the purchase of goods and services by the central procurement office. The cost of any purchase made pursuant to this section shall be borne by the local governmental unit concerned. The central procurement office has the power to promulgate all rules and regulations necessary for the operation of this section, subject to the approval of the procurement commission.

(b) It is the intent of this section that the central procurement office advise local governments of the benefits to be derived from the use of the purchasing procedures authorized herein. Where any local or private act, charter, or general law requires that a local governmental unit purchase by competitive procurement method, the local unit of government may, notwithstanding the local or private act, charter, or general law, purchase, without public advertisement or competitive soliciting, under contracts or price agreements entered into by the central procurement office.

(c) To the extent permitted by federal law or regulations, local governments may make purchases of goods, except motor vehicles other than those manufactured for a special purpose as defined in § 12-3-1208, or services included in federal general service administration contracts or other applicable federal open purchase contracts either directly or through the appropriate state agency; provided, that no purchase under this section shall be made at a price higher than that which is contained in the contract between the general services administration and the vendor affected.