Tennessee Code Title 6. Cities and Towns § 6-35-101

(a) Within the framework established by this charter, the administrative organization of the city shall be organized into departments of general government, finance, and such other departments necessary to provide health, welfare, police, recreation, fire, library, public works, utilities and other municipal services as shall be provided in a plan of administrative organization to be developed by the city manager and submitted to the council for approval and adoption by ordinance.

(b) The council may by ordinance amend the plan of administrative organization only after receiving the written recommendations of the city manager.

(c) Administrative regulations governing the operations and relationships of departments, agencies, and offices within the administrative organization shall be prepared and issued by the city manager; provided, that the authority to prepare and issue departmental rules and regulations may be delegated to designated subordinates.