The Chief of Police, or such member or members of the Police Department as he may designate, shall be sergeant-at-arms of Council meetings.  He, or they, shall carry out all orders and instructions given by the presiding officer for the purpose of maintaining order and decorum at Council meeting.  Upon instructions of the presiding officer, it shall be the duty of the sergeant- at-arms, or any of them present, to place any person who violates the order and decorum of the meeting under arrest, and cause him to be prosecuted under the provisions of the Codified Ordinances, the complaint to be signed by the presiding officer.
(1978 Code Sec. 2-15.)