Which bourbon must include an age statement on its label if aged less than 4 years?

A bourbon must include an age statement on its label if it is aged less than 4 years because it is classified as Straight Bourbon. This classification is important because Straight Bourbon has specific legal definitions and requirements, including the aging process. If the product has been aged for less than four years, federal regulations stipulate that the actual age of the bourbon must be disclosed on the label. This transparency ensures consumers are fully informed about the product they are purchasing, particularly regarding the maturity of the whiskey, which can significantly influence flavor and quality. Other types of bourbon, such as Kentucky Bourbon, Blended Bourbon, and Sour Mash Bourbon, do not have the same stringent labeling requirements relating to age statements unless they also fall under the category of Straight Bourbon.