The Commission, upon the affirmative vote of four members of the Commission, shall appoint a City Manager who shall serve as the chief administrative officer of the city. The Manager need not be a resident of the city or state at the time of appointment but may reside outside the city while in office only with the approval of the Commission. The Manager shall serve at the discretion of and be subject to removal by the Commission, but the Manager shall not be removed from office during a period of ninety (90) days following any regular city election, except by an affirmative vote of five members of the Commission. The Commission shall set the Manager’s compensation.