310 ILCS 125/5-30

The administering State agency shall ensure it communicates clearly with an applicant about the application determination process, including acceptance, status of a pending application, and any reason for denying an application. (1) The administering State agency shall provide notice to an applicant upon finding that a submitted application is defective or should otherwise be considered ineligible, denied, or rejected. (2) The notice from the administering State agency shall explain the reason why an applicant's submitted application is defective or should otherwise be considered ineligible, denied, or rejected. (3) The notice shall contain the necessary information, process, accepted method, and deadline for the applicant to remedy any defective or deficient application, provided that remedy is possible. (4) All notice and correspondence required to be provided by the administering State agency shall be given promptly and without unnecessary delay to any applicant.