35 ILCS 505/1.18

in effect

(35 ILCS 505/1.18) (from Ch. 120, par. 417.18) Sec. 1.18. "Proof gallon" means one gallon of 100 proof alcohol. For example: One gallon of 200 proof alcohol is two proof gallons. For the purpose of this definition "proof" is a term used to describe the strength of an ethyl alcohol solution and is a number that is double that of the percent alcohol in the solution. For example: "100 proof" means 50 percent alcohol. (Source: P.A. 82-152.)

Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://www.ilga.gov/legislation/ilcs/ilcs.aspFetched: 10/17/2026