(1) All members of the board of directors elected at large;
(2) An odd number of directors, including the mayor, with any combination of directors being elected at large and from wards, whether the position designated as mayor is appointed or directly elected;
(3) All members of the board of directors but one (1) elected from wards, with one (1) member elected at large who shall be the mayor; or
(4) All members of the board of directors elected from wards.