Which law stipulates the proof of whiskey must not fall below certain standards?

The Bottled in Bond Act is significant in American whiskey legislation, established in 1897. This law specifically mandates that to be labeled as "bottled in bond," a spirit must meet particular criteria, including being produced during a single distillation season by one distiller at one distillery, aged for at least four years in a federally bonded warehouse, and bottled at exactly 100 proof (50% alcohol by volume). This ensures a consistent standard of quality and safety for consumers.

The law was a response to concerns over authenticity and quality in the whiskey market during a time when many illicit and poorly made spirits were prevalent. By establishing a minimum proof requirement, the Bottled in Bond Act serves to protect consumers and provides a benchmark for quality that whiskey drinkers can rely on. This standard is particularly important for enthusiasts and connoisseurs who seek assurance about the product they are purchasing.