California CodesBusiness and Professions Code - BPCDivision 9 — Alcoholic BeveragesChapter 1 — General Provisions and DefinitionsSection 23032
“Proof spirits” means that alcoholic liquor which contains one-half of its volume of pure ethyl alcohol of a specific gravity of 0.7939 at 60 degrees Fahrenheit, referred to water at 60 degrees Fahrenheit as unity.
Notes
Defines proof spirits as alcoholic liquor containing one-half of its volume as pure ethyl alcohol with a specific gravity of 0.7939 at 60 degrees Fahrenheit, using water at 60 degrees Fahrenheit as unity. The definition fixes both the alcohol proportion and the stated temperature and specific-gravity reference.
Use as reference
Lexinter.net | California Code, Business and Professions Code - BPC § 23032 | https://laws.lexinter.net/codes/california/business-and-professions-code/division-9/chapter-1/section-23032