BOTTLED-IN-BOND
To be labeled as Bottled-in-Bond, a whiskey must:
Be the product of one distillery and distilled during just one distillation season, which can run from January-June or July-December
Be aged for at least four years
Be bottled at exactly 100 Proof
Bear the name and number of the Distilled Spirits Plant (D.S.P.) where it was produced, and, if different, the D.S.P. number of the bottling facility 
 
"This Kentucky Bourbon pays tribute to the earliest days of the Distillery’s history when in 1939 it released Heaven Hill Bottled-in-Bond. The namesake brand quickly became the number-one-selling Bourbon whiskey in the state of Kentucky. Still today, the craftsmanship poured into this bottle by the same founding family meets the exacting standards first set forth in the Bottled-in-Bond act of 1897." -Producer