(10 ILCS 5/3-6)
Notwithstanding any other provision of law, a person who is 17 years old on the date of a caucus, general primary election, or consolidated primary election and who is otherwise qualified to vote is qualified to vote at that caucus, general primary, or consolidated primary, including voting a vote by mail, grace period, or early voting ballot with respect to that general primary or consolidated primary, if that person will be 18 years old on the date of the immediately following general election or consolidated election for which candidates are nominated at that primary.
References in this Code and elsewhere to the requirement that a person must be 18 years old to vote shall be interpreted in accordance with this Section.
For the purposes of this Code, an individual who is 17 years of age and who will be 18 years of age on the date of the general or consolidated election shall be deemed competent to execute and attest to any voter registration forms. An individual who is 17 years of age, will be 18 years of age on the date of the immediately following general or consolidated election, and is otherwise qualified to vote shall be deemed eligible to circulate a nominating petition or a petition proposing a public question.
(Source: P.A. 99-722, eff. 8-5-16; 100-201, eff. 8-18-17.)