T.C.A. §§ 6-18-101 et seq.
The city manager-commission (general law) charter sets specific buying requirements for municipalities so governed. Purchasing and contract procedures not established by the charter or other general laws may be established by ordinance.
The city manager, or his or her designee, is responsible for all municipal purchasing and is authorized to act as purchasing agent for the community.
Before a municipality enters into a purchasing contract or agreement, the finance director must assure the board of commissioners that the funds are available. Until the finance director certifies that the money is available, the board must not authorize the expense by ordinance, resolution, or order.