An office shall be deemed vacant upon the incumbent's death; adjudicated incompetence; conviction of a felony; or other offense pertaining to his office; or unlawful destruction of public records; resignation; recall from office; or ceasing to possess the qualifications for the office; upon the failure of the person elected or appointed to the office to qualify therefor within 10 days after the time for his term of office to commence; or in the case of mayor or commissioner, upon his absence from meetings of the commission for 60 days without the consent of the commission; and upon a declaration by the commission of the vacancy.
Vacant elective offices in the city shall be filled by appointment. A majority vote of the commission shall be required to validate the appointment. 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 tem in the manner provided for filling vacancies in office permanently.