On the first Tuesday in March 1973, and biennially thereafter, the legal voters of said corporation shall elect from among their number a Mayor, who shall hold office for two years, and until his or her successor shall be elected and qualified. On the same date, and annually thereafter, they shall elect three aldermen for two years, and until their successors shall be elected and qualified, to succeed the aldermen whose term expires; a Lister for the term of three years to take the place of the Lister whose term expires; one Auditor for the term of three years; a City Grand Juror.