On each proof gallon of the flavors content of distilled spirits, there shall be allowed a credit against the tax imposed by section 5001 (or 7652) equal to $13.50.
In the case of any fractional part of a proof gallon of the wine content, or of the flavors content, of distilled spirits, a proportionate credit shall be allowed.
For purposes of this section, the wine content, and the flavors content, of imported distilled spirits shall be established by such chemical analysis, certification, or other methods as may be set forth in regulations prescribed by the Secretary.
Except as provided in subparagraph (B), the term “flavors content” means alcohol derived from flavors of a type for which drawback is allowable under section 5114.