220 ILCS 5/8-101
A public utility shall furnish, provide, and maintain such service instrumentalities, equipment, and facilities as shall promote the safety, health, comfort, and convenience of its patrons, employees, and public and as shall be in all respects adequate, efficient, just, and reasonable.
All rules and regulations made by a public utility affecting or pertaining to its charges or service to the public shall be just and reasonable.
A public utility shall, upon reasonable notice, furnish to all persons who may apply therefor and be reasonably entitled thereto, suitable facilities and service, without discrimination and without delay.
Nothing in this Section shall be construed to prevent a public utility from accepting payment electronically or by the use of a customer-preferred financially accredited credit or debit methodology.
220 ILCS 5/8-101