Mississippi Constitution Art. 6, § 170

Each county shall be divided into five districts, a resident freeholder of each district shall be selected, in the manner prescribed by law, and the five so chosen shall constitute the board of supervisors of the county, a majority of whom may transact business. The board of supervisors shall have full jurisdiction over roads, ferries, and bridges, to be exercised in accordance with such regulations as the legislature may prescribe, and perform such other duties as may be required by law; provided, however, that the Legislature may have the power to designate certain highways as “state highways,” and place such highways under the control and supervision of the State Highway Commission, for construction and maintenance. The clerk of the chancery court shall be the clerk of the board of supervisors.