From the regulations linked in the article: ‘‘Chopped Beef’’ or ‘‘Ground Beef’’ shall consist of chopped fresh and/or frozen beef with or without seasoning a

From the regulations linked in the article: ‘‘Chopped Beef’’ or ‘‘Ground Beef’’ shall consist of chopped fresh and/or frozen beef with or without seasoning and without the addition of beef fat as such, shall not contain more than 30 percent fat, and shall not contain added water, phosphates, binders, or extenders. When beef cheek meat (trimmed beef cheeks) is used in the preparation of chopped or ground beef, the amount of such cheek meat shall be limited to 25 percent; and if in ex- cess of natural proportions, its presence shall be declared on the label[...].