(a) No member may be elected or appointed to the city council after the effective date of this amendatory Act of the 93rd General Assembly unless he or she has resided in the ward he or she seeks to represent at least one year next preceding the date of the election or appointment. In the election following redistricting, a candidate for alderperson may be elected from any ward containing a part of the ward in which he or she resided for at least one year next preceding the election that follows the redistricting, and, if elected, that person may be reelected from the new ward he or she represents if he or she resides in that ward for at least one year next preceding the reelection.
     (b) No member of the city council shall at the same time hold any other civil service office under the federal, state or city government, except if such member is granted a leave of absence from such civil service office, or except in the National Guard, or as a notary public, and except such honorary offices as go by appointment without compensation.