Ill. Admin. Code tit. 83, § 280.70
b) Notification: When a customer pays late two times in a 12 month period, the utility shall notify the customer of the availability of a preferred payment date. The utility shall make a record on the customer's account of the notification, and notification shall be made by any of the following methods:
c) Eligibility: Residential customers shall be eligible for a preferred payment date if they are included in any one of the following:
d) Options: The utility shall inform an eligible customer of the following options from which the customer may choose: