Md. Const. art. VII, § 1
The County Commissioners of each county not governed by Article XI-A of this Constitution may be elected by the voters of commissioner districts established therein, or by the voters of the entire county, or by a combination of these methods of election, as provided by the General Assembly by law.
Acts 1890, c. 255, ratified Nov. 3, 1891; Acts 1956, c. 99, ratified Nov. 6, 1956; Acts 1977, c. 681, ratified Nov. 7, 1978; Acts 1986, c. 707, ratified Nov. 4, 1986.