Industrial spirits. As to products of Puerto Rico, distilled spirits produced and warehoused at and withdrawn from distilled spirits plants established and operated under the provisions of this chapter relating to the establishment of such plants and the production, bonded warehousing, and withdrawal from bond of distilled spirits in the United States, or as to products of the Virgin Islands, distilled spirits produced, warehoused, and withdrawn under Virgin Islands regulations.
27 CFR § 26.11
When used in this part and in forms prescribed under this part, where not otherwise distinctly expressed or manifestly incompatible with the intent thereof, terms shall have the meaning ascribed in this section. Words in the plural form shall include the singular and vice versa, and words importing the masculine gender shall include the feminine. The terms includes and including do not exclude things not enumerated which are in the same general class.