It shall be the duty of every member of the council to attend all meetings of the council at the hour appointed therefor and to remain until the session closes, unless excused by the presiding officer. The chief of police shall be ex officio sergeant at arms, and shall attend all meetings of the council at the hour appointed, and remain in attendance until the session closes, unless otherwise ordered. He shall obey all orders of the presiding officer in enforcing order and decorum, and do and perform such other duties as pertain to his office ex officio. (Ord. 1, 10-20-1904)