SECTION XI-1.  MILITARY SERVICE.
   Except as hereafter in this section provided, if a person holding an elective office in the Municipality shall be called into active military service during his elective term, his office shall thereupon become vacant, and it shall be filled as provided by this Charter.  Membership in military reserve or State militia shall not create a vacancy in office unless the office holder be called to full time military service for a period exceeding thirty (30) consecutive days.