Ill. Admin. Code tit. 83, § 280.130
b) Allowable Reasons for Disconnection:
c) Non-deniable Charges: The following shall not constitute valid reasons for disconnection of regulated utility services:
d) Disconnection Notice Content: Utility disconnection notices shall conform with Appendices A, B and D and shall include at least:
e) Method of Disconnection Notice Delivery:
g) Timing of Notice:
h) Exemptions to Notice Requirements: Disconnection notices substantially in the form of Appendix A shall be required prior to all disconnections of service, except in cases of:
i) Warning Letter Required Instead of Appendix A (Disconnection Notice for Occupant Usage without Valid Customer):
j) Warning Call to Residential and Master-Metered Customers:
k) Obligation to Act:
l) Time of Day and Day of the Week Prohibitions and Limits: Except for matters of safety, emergency maintenance and cooperation with civil authorities, a utility shall comply with the following prohibitions and limits upon disconnection:
n) Temperature Prohibitions:
1) Cold weather: Termination of gas and electric utility service to all residential users, including all tenants of apartment buildings where gas or electricity is used as the only source of space heating or to control or operate the only space heating equipment, is prohibited:
2) Hot weather: If gas or electricity is used as the only source of space cooling or to control or operate the only space cooling equipment at a residence or master-metered apartment building, then a utility with over 100,000 residential customers may not terminate gas or electric utility service to the residential user, including all tenants of master-metered apartment buildings: