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.
35 ILCS 505/1.18
"Proof gallon" means one gallon of 100 proof alcohol
Known as the Motor Fuel Tax Law
The act spans §§ 35-505-1 to 35-505-8b (85 sections).
P.A. 82-152.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.