10 ILCS 5/1-9.2
No later than 48 hours after the closing of polling locations on election day, each election authority maintaining a website shall post the number of ballots that remain uncounted. The posting shall separate the number of ballots yet to be counted into the following categories: ballots cast on election day, early voting ballots, provisional ballots, vote by mail ballots received by the election authority but not counted, and vote by mail ballots sent by the election authority but have not been returned to the election authority. This information shall be updated on the website of the election authority each day until the period for counting provisional and vote by mail ballots has ended. All election authorities, regardless of whether they maintain a website, shall share the same information, separated in the same manner, with the State Board of Elections no later than 48 hours after the closing of polling locations on election day and each business day thereafter until the period for counting provisional and vote by mail ballots has ended.
10 ILCS 5/1-9.2