10 ILCS 5/1-16

If an election authority is required by law to send an election-related notice to an individual, that election authority may send that notice solely by electronic mail if the individual provides a current e-mail address to the election authority and authorizes the election authority to send notices by electronic mail. For the purposes of this Section, the term "notice" does not include a ballot or any notice required under Sections 1A-16.5 or 1A-16.7 of this Code.