7 CFR § 29.2440 - (N Group).

Extremely common tobacco which does not meet the minimum specifications or which exceeds the tolerance of the lowest grade of any other group except scrap.

U.S. grades	Grade names and specifications
N1L	First quality light colored nondescript, thin to medium body and 50 percent injury tolerance.
N1D	First quality dark colored nondescript, medium to heavy body and 50 percent injury tolerance.
N1GL	First quality light colored crude green nondescript, thin to medium body and 50 percent crude leaves or injury tolerance.
N1GD	First quality dark colored crude green nondescript, medium to heavy body and 50 percent crude leaves or injury tolerance.
N2	Substandard Nondescript—Nondescript of any group or color, over 50 percent crude leaves or injury tolerance.

[45 FR 47115, July 14, 1980]