Mo. Rev. Stat. § 311.025: Missouri bourbon and Missouri bourbon whiskey labels, use of name, criteria.

1. To qualify as "Missouri Bourbon" or "Missouri Bourbon Whiskey", and to be labeled as such, a product shall be a spirit that meets the following conditions:

(1) The product shall be mashed, fermented, distilled, aged, and bottled in Missouri; and

(2) The product shall be aged in oak barrels manufactured in Missouri.

2. Beginning January 1, 2020, to qualify as "Missouri Bourbon" or "Missouri Bourbon Whiskey", and to be labeled as such, all corn used in the mash must be Missouri-grown corn.