At a Council meeting, every member present when a question is put shall vote either "yes" or "no"; provided, that if any Council member does not desire to vote on any question, he may be shown on the record as having "abstained." The record shall show whenever the vote is unanimous. In all other cases, the vote shall be called and recorded. No member shall vote on any matter in which he has a personal interest other than as a taxpayer of the City.
(1970 Code Sec. 2-33)