Section 4. Election; term; salary

The mayor shall be elected at the general
  election  in  the year nineteen hundred sixty-five and every fourth year
  thereafter. The mayor shall  hold  office  for  a  term  of  four  years
  commencing on the first day of January after each such election. A mayor
  who  resigns or is removed from office prior to the completion of a full
  term shall be deemed to have held  that  office  for  a  full  term  for
  purposes  of  section 1138 of the charter. The salary of the mayor shall
  be two hundred twenty-five thousand dollars a year.