CFR /  Title 7  /  Part 51  /  Sec. 51.1542 U.S. Commercial.

``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 Sec. 51.1546.