Ill. Admin. Code tit. 26, § 216.70
a) The State Board of Elections shall, and all persons accepting from applicants Voter Registration Applications are encouraged to, transmit executed applications to the election authority:
f) Every application received by an election authority shall be examined to determine if the information contained on the application is sufficient on its face to cause the applicant to be listed among the voters of the jurisdiction, or if the application duplicates a record or Voter Registration Card already on file with the election authority.
2) If the information is insufficient, the election authority shall send the applicant a forwardable Disposition of Registration notice informing the applicant: