21 U.S.C. § 321a : US Code - Section 321A: "Butter" defined

Search 21 U.S.C. § 321a : US Code - Section 321A: "Butter" defined

For the purposes of the Food and Drug Act of June 30, 1906
(Thirty-fourth Statutes at Large, page 768) "butter" shall be
understood to mean the food product usually known as butter, and
which is made exclusively from milk or cream, or both, with or
without common salt, and with or without additional coloring
matter, and containing not less than 80 per centum by weight of
milk fat, all tolerances having been allowed for.