7 CFR § 51.1522
U.S. Combination
July 6, 2020
“U.S. Combination” consists of a combination of U.S. No. 1 and U.S. No. 2 plums or prunes: Provided, That at least 75 percent, by count, meet the requirements of U.S. No. 1 grade. (See §51.1525.)