CFR > Title 27 - Alcohol, Tobacco Products and Firearms > CHAPTER I—ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY > SUBCHAPTER A—LIQUORS (parts 1 to 31) > PART 19—DISTILLED SPIRITS PLANTS > SUBPART M—Storage of Distilled Spirits (§19.321 to §19.333) > 19.328—Determining age of mingled spirits.