405 ILCS 48/25: Advertisement and sales; misrepresentation.

No person or entity may, in the conduct of any trade or commerce, use or employ any deception, fraud, false pretense, false promise, misrepresentation, or the concealment, suppression, or omission of any material fact in advertising or otherwise offering conversion therapy services in a manner that represents homosexuality as a mental disease, disorder, or illness, with intent that others rely upon the concealment, suppression, or omission of such material fact. A violation of this Section constitutes an unlawful practice under the Consumer Fraud and Deceptive Business Practices Act.