Section 55 ILCS 5/2-3009 - Terms of board members; vacancies; elections(a) County board member elections by county board districts. In those counties subject to this Division which elect county board members by county board districts the members shall, no later than 45 days after December 15, 1982, and thereafter no later than September 1 of the year of the next general election following reapportionment, divide the county board districts publicly by lot as equally as possible into 2 groups. Board members or their successors from one group shall be elected for successive terms of 2 years, 4 years and 4 years; and members or their successors from the second group shall be elected for successive terms of 4 years, 4 years, and 2 years. A county under this subsection may, by ordinance, decide to divide the county board districts into 3 rather than 2 groups. If a county adopts an ordinance to this effect, the members of the county board shall divide the county board districts publicly by lot as equally as possible into 3 groups no later than September 1 of the year of the next general election following reapportionment. Board members or their successors from one group shall be elected for successive terms of 2 years, 4 years, and 4 years; members or their successors from the second group shall be elected for successive terms of 4 years, 2 years, and 4 years; and members or their successors from the third group shall be elected for successive terms of 4 years, 4 years, and 2 years. All terms shall commence on the first Monday of the month following the month of election.(b) County board member elections at large. In those counties which elect county board members at large, under Sections 2-3002 and 2-3006, the members elected in the general election following reapportionment shall, no later than 45 days after taking office, divide themselves publicly by lot as equally as possible into 2 groups. Board members or their successors from one group shall be elected for successive terms of 2 years, 4 years and 4 years; and members or their successors from the second group shall be elected for successive terms of 4 years, 4 years and 2 years. A county under this subsection may, by ordinance, decide to divide the county board members into 3 rather than 2 groups. If a county adopts an ordinance to this effect, the members of the county board elected in the general election following reapportionment shall, no later than 45 days after taking office, divide themselves publicly by lot as equally as possible into 3 groups. Board members or their successors from one group shall be elected for successive terms of 2 years, 4 years, and 4 years; members and their successors from the second group shall be elected for successive terms of 4 years, 2 years, and 4 years; and members or their successors from the third group shall be elected for successive terms of 4 years, 4 years, and 2 years. All terms shall commence on the first Monday of the month following the month of election.(c) Vacancies; time for elections. In counties under subsection (a) or (b), if a vacancy occurs in the office of chairman of the county board, the remaining members of the board shall elect one of the members of the board to serve for the balance of the unexpired term of the chairman. In counties under subsection (a) or (b), the time for the election of county board members shall be as provided by the general election law for the election of such members.