10 ILCS 5/18-9
The judges of election shall first count the whole number of ballots in the box. If the ballots shall be found to exceed the number of applications for ballot, they shall reject the ballots, if any, found folded inside of a ballot. And if the ballots and the applications for ballot still do not agree after such rejection, the ballots shall be replaced in the box and the box closed and well shaken, and again opened; and one of the judges shall publicly draw out so many ballots unopened as shall be equal to such excess. Such excess ballots shall be marked "ExcessNot Counted" and signed by a majority of judges and shall be placed in the "After 6:00 p.m. Defective Ballots Envelope". The number of excess ballots shall be noted in the remarks section of the Certificate of Results. "Excess" ballots shall not be counted in the total of "defective" ballots. And the ballots and applications for ballot being made to agree in this way, the judges shall proceed to count the votes in the following manner: The judges shall open the ballots and place those which contain the same names together, so that the several kinds shall be in separate piles or on separate files. Each of the judges shall examine the separate files which are, or are supposed to be, alike, and exclude from such files any which may have a name or an erasure, or in any manner shall be different from the others of such file. One of the judges shall then take one file of the kind of ballots which contain the same names, and count them by tens, carefully examining each name on each of the ballots. Such judge shall then pass the ten ballots aforesaid to the judge sitting next to him, who shall count them in the same manner, who shall then pass them to a third judge, who shall also count them in the same manner. Then the third judge shall call the names of the persons named in the ten ballots, and the offices for which they are designated, and 2 of the judges, who did not assist in the counting shall tally ten votes for each of such persons, except as herein otherwise provided. When the judges shall have gone through such file of ballots, containing the same names, and shall count them by tens in the same way, and shall call the names of the persons named in the ballots and the office for which they are designated, the tally judges shall tally the votes by tens for each of such persons in the same manner as in the first instance. When the counting of each file of ballots which contain the same names shall be completed, the tally judges shall compare their tallies together and ascertain the total number of ballots of that kind so canvassed; and when they agree upon the number, one of them shall announce it in a loud voice to the other judges. The judges shall then canvass the other kinds of ballots which do not correspond, those containing names partly from one kind of ballots and partly from another, being those from which the name of the person proper to be voted for on such ballots has been omitted or erased, usually called "scratched tickets". They shall be canvassed separately by one of the judges sitting between 2 other judges, which judge shall call each name to the tally judges and the office for which it is designated, and the other judges looking at the ballot at the same time, and the tally judges making tally of the same. When all the ballots have been canvassed in this manner, the tally judges shall compare their tallies together, and ascertain the total number of votes received by each candidate and when they agree upon the numbers one of them shall announce in a loud voice to the judges the number of votes received by each candidate on each of the kinds of ballots containing his name, the number received by him on scratch tickets, and the total number of votes received by him.
The votes for the offices of Governor and Lieutenant Governor shall be counted and tallied jointly.
Where voting machines or electronic voting systems are used, the provisions of this section may be modified as required or authorized by Article 24 or Article 24A, whichever is applicable.
10 ILCS 5/18-9