the county mayor shall enter an order so finding, approving the creation of the district, designating it as “the Utility District of County, Tennessee,” defining its territorial limits, stating the service or services that the district shall be authorized to furnish, and appointing as commissioners of the district those persons nominated in the petition, of whom one (1) shall be appointed for a term of two (2) years, one (1) for a term of three (3) years, and one (1) for a term of four (4) years. Such order shall be subject to approval by a simple majority vote of the county legislative body of each county in which the district is created before it is filed with the county clerk and entered on record.