27 C.F.R. § 19.348 Determining age of mingled spirits.
Title 27 - Alcohol, Tobacco Products and Firearms
When spirits are mingled, the age of the spirits for the entire lot shall be the age of the youngest spirits contained in the lot. (Sec. 201, Pub. L. 85–859, 72 Stat. 1356, as amended (26 U.S.C. 5201))
Title 27: Alcohol, Tobacco and Firearms
PART 19—DISTILLED SPIRITS PLANTS
Subpart L—Storage
Mingling or Blending of Spirits
§ 19.348 Determining age of mingled spirits.

