220 ILCS 40/10: Prohibited Activity.

(a) No person may interfere or threaten to interfere with or cause any interference with the utility service of a small business or penalize any person who supplies information to the Advocate or participates in any of the Advocate's activities, in retribution for supplying such information or for such participation.

(b) No person may act with intent to prevent, interfere with or hinder the activities permitted under this Act.