(65 ILCS 5/5-2-18.2) (from Ch. 24, par. 5-2-18.2)

Sec. 5-2-18.2.

In any city which has adopted this Article, and also has elected to
choose alderpersons from wards, a proposition to elect part of the city
council at large and part from districts shall be submitted to the
electors upon the petition herein provided.

Electors of such city, equal in number to not less than 10% of the
total vote cast for all candidates for mayor in the last preceding
municipal election for such office, may petition for the submission
to a vote of the electors of that city the
proposition whether part of the city council shall be elected at large
and part from districts. The petition shall be in the same form as
prescribed in Section 5-1-6, except that said petition shall be modified
as to the wording of the proposition to be voted upon, to conform to the
wording of the proposition as hereinafter set
forth, and shall be filed with the city clerk in accordance with the general
election law. The city clerk shall certify the proposition to the proper
election authorities who shall submit the proposition at an election in
accordance with the general election law.

However, such proposition shall not be submitted at the general primary
election for the municipality.

The proposition shall be substantially in the
following form:

---------------------------------------------------------------------------------------------------------------------
    Shall the city of....
elect part of the councilmen          YES
at large and part of             -----------------------------------------------------------------------------
the councilmen from                   NO
districts?
---------------------------------------------------------------------------------------------------------------------

If a majority of those voting on the proposition vote "yes", then at
the next general municipal election and every 4 years thereafter, a
mayor and part of the councilmen shall be elected at large and part of
the councilmen shall be elected from wards, the total number of
councilmen to be elected to equal the number of alderpersons authorized to
be elected prior to adoption of the proposition.

The city council shall divide the city, whenever necessary
thereafter, into districts which shall be of as compact and contiguous
territory as practicable and of approximately equal population. The
number of such districts shall be equal to half the number of alderpersons 
then authorized to be elected to office in such city. If there is an odd
number of such alderpersons, the number of districts established shall be
equal to the number which represents a majority of the number of such alderpersons.

One councilman, who is an actual resident of the district, shall be
elected from each district. Only the electors of a district shall elect
a councilman from that district. The rest of the number of councilmen
authorized shall be elected at large.

The mayor and councilmen shall hold their respective offices for the
term of 4 years and until their successors are elected and qualified.
Upon the election and qualification of the councilmen, the terms of all
sitting alderpersons shall expire.

(Source: P.A. 102-15, eff. 6-17-21.)