U.S. Commercial.
CFR · 2024-01-01 · US · Title 7
“U.S. Commercial” consists of potatoes which meet the requirements of U.S. No. 1 grade except for the following: (a) Free from serious damage caused by: (1) Dirt or other foreign matter; (2) Russet scab; and, (3) Rhizoctonia. (b) Increased tolerances for defects specified in § 51.1546.
official document · source cfr-2024 · id 7:§ 51.1542