The Council shall consist of seven (7) members all of whom shall be elected at large. The terms of the members of the Council shall begin on the first day of January next following their election and they shall serve for a term of four (4) years or until their successors are chosen and qualified; except that of the seven (7) members elected in 1961, the three (3) receiving the largest number of votes shall serve for a term of four (4) years and the remaining four (4) shall serve for a term of two (2) years.