The terms of all elective officers shall terminate with the adoption of this Charter. Those holding offices in Council and the Mayor at the tune of the adoption of this Charter shall thereafter continue in office with all the powers, duties, responsibilities and remunerances provided in this Charter for Council and Mayor until January 1, 1966, when those duly elected to the offices of Council and Mayor shall succeed them. The position of Clerk-Treasurer shall be assumed by the person holding the office of Village Clerk at the time of adoption of this Charter and shall continue with all the power, duties, responsibilities and remunerances provided in this Charter for the Clerk-Treasurer until January 1, 1966, when the person duly elected in the November, 1965 election shall assume office. The existing term of the Treasurer shall terminate on December 31, 1964. Any vacancy occurring in the offices of Mayor, Council or Clerk-Treasurer prior to January 1, 1966, shall be filled in the manner provided in this Charter and the size of the Council shall be increased to seven (7) members prior to such date by the appointed procedure set forth herein at Section 3.08.