7 Pa. Code § 1.382
"Roast Beef Parboiled and Steam Roasted" shall be prepared so that the weight of the finished product, excluding salt and flavoring material, shall not exceed 70% of the fresh beef weight. Beef cheek meat and beef head meat from which the overlying glandular and connective tissues have been removed, and beef heart meat, exclusive of the heart cap, may be used individually of collectively to the extent of 5% of the meat ingredients in the preparation of canned product labeled "Roast Beef Parboiled and Steam Roasted." When beef cheek meat, beef head meat or beef heart meat are used in the preparation of the product, its presence shall be reflected in the statement of ingredients.
7 Pa. Code § 1.382
This section cited in 7 Pa. Code § 1.391 (relating to corned beef).