The members of the board of supervisors of elections shall be persons of high character and integrity and of recognized business capacity. They shall be residents and qualified voters of the city. No more than two (2) members of the board of supervisors of elections shall be members of the same political party, and no member of the board of supervisors of elections shall hold or be a candidate for any elective office during his term as supervision [supervisors] of elections. (Acts 1951, Ch. 539, § 42)