An office shall be deemed vacant upon the incumbent's death, incompetence, conviction of a felony, resignation, or absence from the city for 30 days without the consent of the council in the case of mayor or councilperson; upon the incumbents ceasing to possess the qualifications necessary for his office; or upon the failure of the person elected or appointed to an office to qualify therefor on or before the day his term of office commences; and in the case of mayor or councilperson, upon his absence from meetings of the council for 60 days without the consent of the Council.
Vacancies in elective offices of the city shall be filled by appointment by a majority of the entire membership of the council. The appointee's term of office shall begin immediately upon his appointment and shall continue throughout the unexpired term of his predecessor.
During the temporary disability of any officer or during his absence temporarily from the city for any cause, his office may be filled pro tern in the manner provided for filling vacancies in office permanently.