At its organization meeting, the Council shall elect, from its membership, a President Pro- Tem of Council who shall act as President during the absence or disability of the President. The President Pro-Tem of Council and successor, if any, shall serve until the next organization meeting except upon resignation as President Pro-Tem, or upon ceasing in the meantime to be a member of Council, or being removed by a vote of not less than two-thirds (2/3) of the members of Council, in which event the Council shall proceed to elect a successor.