55 ILCS 5/2-4006.5
2021 Illinois Compiled Statutes|Chapter 55 - COUNTIES|55 ILCS 5/ - Counties Code.|Article 2 - Governing Bodies

Sec. 2-4006.5. Commissioners in certain counties.(a) If a county elects 3  commissioners at large under Section 2-4006, registered voters of such  county may, by a vote of a majority of those voting on such proposition,  determine to change the method of electing the board of county commissioners  by electing either 3 or 5 members from single-member districts.  In order for such question to be placed upon the ballot, such petition must  contain the signatures of not fewer than 10% of the registered voters of such  county.Commissioners may not be elected from single-member districts until the  question of electing either 3 or 5 commissioners from single-member districts has been submitted to the  electors of the county at a regular election and approved by a majority of the  electors voting on the question.  The commissioners must certify the question  to  the proper election authority, which must submit the question at an election in  accordance with the Election Code.The question must be in substantially the following form:Shall the board of county commissioners of (name of     county) consist of (insert either 3 or 5) commissioners elected from single-member  districts?  The votes must be recorded as "Yes" or "No".If a majority of the electors voting on the question vote  in the affirmative, a 3-member or 5-member board of county commissioners,  as the case may be,  shall be established to be elected  from single-member   districts.(b) If the voters of the county decide to elect either 3 or 5 commissioners  from single-member districts, the  board of county commissioners shall on or before  August 31 of the year following the 2000 federal decennial census divide the  county into either 3 or 5 compact and contiguous county  commission districts that are substantially equal in population.  On or before  May 31 of the year following each federal decennial census thereafter, the  board of county commissioners  shall reapportion the county commission districts to be compact, contiguous,  and substantially equal in population.(c) The commissioners elected at large at or before  the general election in 2000 shall continue to serve until the expiration  of their terms. Of those commissioners, the commissioner whose term expires in  2002 shall be assigned to district 1; the commissioner whose term expires in  2004 shall be assigned to district 2; and the commissioner whose term expires  in 2006 shall be assigned to district 3.(d) If the voters of the county decide to elect 5 commissioners from single-member districts, at the general election in 2002, one commissioner from and  residing in each of districts 1, 4, and 5 shall be elected.  At the general  election in 2004, one commissioner from and residing in each of districts  1, 2, and 5 shall be elected.  At the general election in  2006, one commissioner from and residing in each of districts 2, 3, and 4  shall be elected.  At  the general election in 2008, one commissioner from and residing in each of  districts 1, 3, and  5 shall be elected.  At the general election in 2010, one commissioner from  each of districts 2 and 4 shall be elected.  At the general election in 2012,  commissioners from and residing in each district shall be elected.  Thereafter, commissioners  shall be elected at each general election to fill expired terms.  Each commissioner must reside in the district that he or she represents from  the time that he or she files his or her nomination papers until his or her  term expires.In the year following the decennial census of 2010 and every 10 years  thereafter, the commissioners, publicly by  lot, shall divide the districts into 2 groups.  One group  shall serve terms of 4 years, 4 years, and 2 years and one group shall serve  terms of 2  years, 4 years, and 4  years.  (Source: P.A. 102-687, eff. 12-17-21.)