- Where: USA only - Mashbill: Must use at least 51% corn, other grains typically used are rye or wheat and barley - Distillation Method: No legal requirement for types of still used, but typically column-stills and either a doubler or thumper is used. Pot stills are utilized by some producers. - Aging Requirements: No minimum amount of time for aging, but straight whiskeys have aged a minimum of 2 years. If aged under 4 Years, age must be stated on the label. - Type of Barrels Used: Must use new, charred barrels
