(a) The Chief of Police, by a letter to the Board of Police Commissioners, shall designate a person or persons who shall serve as Acting Chief of Police for those periods of time that the Chief of Police is out of the City or is temporarily unable to perform the duties of the office.
(b) The Board of Police Commissioners is authorized to appoint a temporary Chief of Police during a vacancy in the office and pending the regular appointment of a Chief of Police. The person appointed as temporary Chief of Police shall be entitled to compensation appropriate to the position of Chief of Police for the duration of the appointment. The length of the temporary appointment shall not exceed 12 months and shall terminate when a regular appointment is made. The appointment of a temporary Chief of Police shall terminate the authority of an Acting Chief of Police.