U.S. No. 1.
CFR · 2024-01-01 · US · Title 7
“U.S. No. 1” consists of potatoes which meet the following requirements: (a) Similar varietal characteristics, except when designated as a mixed or specialty pack; (b) Firm; (c) Fairly clean; (d) Fairly well shaped; (e) Free from: (1) Freezing; (2) Blackheart; (3) Late blight, southern bacterial wilt and ring rot; and, (4) Soft rot and wet breakdown. (f) Free from damage by any other cause. See §§ 51.1564 and 51.1565. (g) Size. Not less than 1 (h) For tolerances see § 51.1546.
official document · source cfr-2024 · id 7:§ 51.1541