29.6130—Nondescript (N Group).

Tobacco which does not meet the minimum specifications or exceeds the tolerance of the lowest grade of any other group.

U.S. grades	Grade names, minimum specifications, and tolerances
N1	First Quality Nondescript. Tolerances: 20 percent crude, 20 percent frozen, and 60 percent injury.
N2	Second Quality Nondescript. Over 20 percent crude, over 20 percent frozen, or over 60 percent injury.

CFR