Council shall determine which job classification of the Municipality shall be within the classified service and which shall be within the unclassified service, provided that, except as qualified in Section 12.03 hereof, regular full-time members of the Division of Police and Fire, including the Chief of Police and Fire Chief, shall be in the classified service, and provided further that persons, other than those serving a probationary period of employment, who have been employed continuously on a full-time basis in the service of the Municipality in the same or similar position included in the classified service for at least ninety (90) days prior to the date such position is placed in the classified service, shall be retained in the same or similar position without examination until discharged, reduced, disciplined, promoted, or transferred, in accordance with the rules and regulations of the Commission.