7 CFR §30.37

1. (a)Type 21. That kind of fire-cured tobacco commonly known as Virginia Fire-cured, or Dark-fired, produced principally in the Piedmont and mountain sections of Virginia.
2. (b)Type 22. That type of fire-cured tobacco, known as Eastern District Fire-cured, produced principally in a section east of the Tennessee River in southern Kentucky and northern Tennessee.
3. (c)Type 23. That type of fire-cured tobacco, known as Western District Fire-cured or Dark-fired, produced principally in a section west of the Tennessee River in Kentucky and extending into Tennessee.