A Police Department is hereby established. The head of this Department shall be known as the Chief of Police, and the number of additional members and employees of the Police Department shall be recommended by the Police Commission to the Council, which may be changed from time to time. The Mayor shall have, without the approval of the Council, authority to appoint additional members of the Police Department for temporary duty when, in his or her judgment, an emergency exists for the preservation of life or property. The Chief of Police and all members of the Police Department shall have the powers and authority of police officers generally and shall perform such duties as are required of them by the Council, the Police Commission, the City Administrator or by law. The Chief of Police shall develop an annual Department budget to be approved by the Council, have general superintendence of the Police Department and custody of all property used and maintained for the purposes of the Department. It is the duty of the Chief of Police to file reports as may be required by the City Administrator, Police Commission and Council.