Rule 21.
CFR · 2024-01-01 · US · Title 7
Tobacco damaged under 20 percent but which otherwise meets the specifications of a grade shall be treated as a subgrade by placing the special factor “U” after the grademark. Tobacco damaged 20 percent or more shall be designated “No-G.”
official document · source cfr-2024 · id 7:§ 29.3622