Minn. Stat. § 161.33: EMPLOYEE INTEREST IN CONTRACT, UNLAWFUL.

It shall be unlawful for any member or employee of the Department of Transportation to be directly or indirectly interested in any contract for the construction or improvement of any public road or bridge, or in any contract for the repair, purchase or sale of any road machinery, equipment, materials, or supplies to be used thereon. Any person violating any of the foregoing provisions shall be guilty of a gross misdemeanor.