At each mayoral election beginning with the first election under this Charter a Mayor shall be elected for a term of four years. Only registered voters of the City shall be eligible to hold the office of Mayor. The Mayor shall be a member of the City Council and shall preside and vote at meetings of the Council, represent the City in inter-governmental relationships, appoint with the advice and consent of the Council the members of citizen advisory boards and commissions, present an annual state of the City message, and perform the duties specified by the Council. The Mayor shall be the chief executive officer of the City. The Council shall elect from among its members a Deputy Mayor who, if a vacancy occurs, shall become Mayor for the remainder of the unexpired term.