10 ILCS 5/24B-9.1
2021 Illinois Compiled Statutes|Chapter 10 - ELECTIONS|10 ILCS 5/ - Election Code.|Article 24B - Electronic, Mechanical Or Electric Voting Systems With Precinct Tabulation Optical Scan Technology Capability

Sec. 24B-9.1. Examination of Votes by Electronic Precinct  Tabulation Optical Scan Technology Scanning Process or other authorized  electronic process; definition of a vote.(a) Examination of Votes by Electronic Precinct Tabulation Optical Scan  Technology Scanning Process. Whenever a  Precinct Tabulation Optical Scan Technology process is used  to automatically examine and count the votes on ballot sheets,  the provisions of this Section shall apply.  A voter shall cast a  proper vote on a ballot sheet by making a mark, or causing a mark to be  made, in the designated  area for the casting of a vote for any party or candidate or for  or against any proposition.  For this purpose, a mark is an  intentional darkening of the designated area on the ballot,  and not an identifying mark.(b) For any ballot sheet that does not register a vote for one or more  ballot positions on the ballot sheet on a Electronic Precinct Tabulation  Optical Scan Technology Scanning Process, the following shall constitute a vote  on the ballot sheet:(1) the designated area for casting a vote for a     particular ballot position on the ballot sheet is fully darkened or shaded in;(2) the designated area for casting a vote for a     particular ballot position on the ballot sheet is partially darkened or shaded in;(3) the designated area for casting a vote for a     particular ballot position on the ballot sheet contains a dot or ".", a check, or a plus or "+";(4) the designated area for casting a vote for a     particular ballot position on the ballot sheet contains some other type of mark that indicates the clearly ascertainable intent of the voter to vote based on the totality of the circumstances, including but not limited to any pattern or frequency of marks on other ballot positions from the same ballot sheet; or(5) the designated area for casting a vote for a     particular ballot position on the ballot sheet is not marked, but the ballot sheet contains other markings associated with a particular ballot position, such as circling a candidate's name, that indicates the clearly ascertainable intent of the voter to vote, based on the totality of the circumstances, including but not limited to, any pattern or frequency of markings on other ballot positions from the same ballot sheet.(c) For other electronic voting systems that use a computer as the marking  device to mark a ballot sheet, the bar code found on the ballot sheet shall  constitute the votes found on the ballot.  If, however, the county clerk or  board of election commissioners determines that the votes  represented by the tally on the bar code for one or more ballot positions is  inconsistent with the votes represented by numerical ballot positions  identified on the ballot sheet produced using a computer as the marking device,  then the numerical ballot positions identified on the ballot sheet shall  constitute the votes for purposes of any official canvass or recount  proceeding. An electronic voting system that uses a computer as the marking  device to mark a ballot sheet shall be capable of producing a ballot sheet that  contains all numerical ballot positions selected by the voter,  and provides a place for the voter to cast a write-in vote for a candidate  for a particular numerical ballot position.(d) The election authority shall provide an envelope, sleeve or  other device to each voter so the voter can  deliver the voted ballot sheet to the counting equipment and  ballot box without the votes indicated on the ballot sheet being  visible to other persons in the polling place.       (Source: P.A. 95-331, eff. 8-21-07.)