(10 ILCS 5/28-12) (from Ch. 46, par. 28-12)

Sec. 28-12. Upon receipt of the certificates of the election authorities showing the results of the sample signature verification, the Board shall:

1. Based on the sample, calculate the ratio of invalid or valid signatures in each election jurisdiction.

2. Apply the ratio of invalid to valid signatures in an election jurisdiction sample to the total number of petition signatures submitted from that election jurisdiction.

3. Compute the degree of multiple signature contamination in each election jurisdiction sample.

4. Adjust for multiple signature contamination and the invalid signatures, project the total number of valid petition signatures submitted from each election jurisdiction.

5. Aggregate the total number of projected valid signatures from each election jurisdiction and project the total number of valid signatures on the petition statewide.

If such statewide projection establishes a total number of valid petition signatures not greater than 95.0% of the minimum number of signatures required to qualify the proposed statewide advisory public question for the ballot, the petition shall be presumed invalid; provided that, prior to the last day for ballot certification for the general election, the Board shall conduct a hearing for the purpose of allowing the proponents to present competent evidence or an additional sample to rebut the presumption of invalidity. At the conclusion of such hearing, and after the resolution of any specific objection filed pursuant to Section 10-8 of this Code, the Board shall issue a final order declaring the petition to be valid or invalid and shall, in accordance with its order, certify or not certify the proposition for the ballot.

If such statewide projection establishes a total number of valid petition signatures greater than 95.0% of the minimum number of signatures required to qualify the proposed Constitutional amendment or statewide advisory public question for the ballot, the results of the sample shall be considered inconclusive and, if no specific objections to the petition are filed pursuant to Section 10-8 of this Code, the Board shall issue a final order declaring the petition to be valid and shall certify the proposition for the ballot.

In either event, the Board shall append to its final order the detailed results of the sample from each election jurisdiction which shall include: (a) specific page and line numbers of signatures actually verified or determined to be invalid by the respective election authorities, and (b) the calculations and projections performed by the Board for each election jurisdiction.

(Source: P.A. 97-81, eff. 7-5-11.)