Tenn. Code Ann. § 6-33-106

The council shall establish a planning commission, and may by ordinance within the framework of this charter, exercise authority in the fields of planning, zoning, subdivision control and related activities as provided by general laws of the state. The rules and regulations of the planning commission shall have no force or effect unless approved by the council. No later than ninety (90) days prior to each fiscal year, the planning commission shall submit to the city manager a long-term capital improvement program with recommendations as to the priority of individual projects and the methods of financing them. The members of the planning commission shall serve without compensation, but may be reimbursed for necessary expenses incurred in official duties.