(1) The election commissioner or county clerk shall create precincts composed of compact and contiguous territory within the boundary lines of legislative districts. The precincts shall contain not less than seventy-five nor more than one thousand seven hundred fifty registered voters based on the number of voters voting at the last statewide general election, except that a precinct may contain less than seventy-five registered voters if in the judgment of the election commissioner or county clerk it is necessary to avoid creating an undue hardship on the registered voters in the precinct. The election commissioner or county clerk shall create precincts based on the number of votes cast at the immediately preceding presidential election or the current list of registered voters for the precinct. The election commissioner or county clerk shall revise and rearrange the precincts and increase or decrease them at such times as may be necessary to make the precincts contain as nearly as practicable not less than seventy-five nor more than one thousand seven hundred fifty registered voters voting at the last statewide general election. The election commissioner or county clerk shall, when necessary and possible, readjust precinct boundaries to coincide with the boundaries of cities, villages, and school districts which are divided into districts or wards for election purposes. The election commissioner or county clerk shall not make any precinct changes in precinct boundaries or divide precincts into two or more parts between the statewide primary and general elections unless he or she has been authorized to do so by the Secretary of State. If changes are authorized, the election commissioner or county clerk shall notify each state and local candidate affected by the change.

(2) The election commissioner or county clerk may alter and divide the existing precincts, except that when any city of the first class by ordinance divides any ward of such city into two or more voting districts or polling places, the election commissioner or county clerk shall establish precincts or polling places in conformity with such ordinance. No such alteration or division shall take place between the statewide primary and general elections except as provided in subsection (1) of this section.

(3) Following the release of the 2020 Census of Population data by the United States Department of Commerce, Bureau of the Census, as required by Public Law 94-171, the election commissioner or county clerk shall create, revise, or rearrange precincts in compliance with subsections (1) and (2) of this section and deliver maps of the updated precinct boundaries to all applicable political subdivisions within the jurisdiction of the election commissioner or county clerk by November 1, 2021.

(4) The Secretary of State may grant additional days for election commissioners and county clerks to meet the requirements of subsection (3) of this section for an extraordinary circumstance.