Tennessee Code Title 12. Public Property, Printing and Contracts § 12-3-801

Whenever possible, all procurement specifications and scopes of work for goods and services to be purchased by the central procurement office or state agencies shall be worded or designed to permit open and competitive soliciting for the supplying of the goods or services to which they apply and all proprietary specifications and scopes of work shall be developed in accordance with rules of the central procurement office approved by the procurement commission.