Minn. Stat. § 471.87: PUBLIC OFFICERS, INTEREST IN CONTRACT; PENALTY.

Except as authorized in section 123B.195 or 471.88, a public officer who is authorized to take part in any manner in making any sale, lease, or contract in official capacity shall not voluntarily have a personal financial interest in that sale, lease, or contract or personally benefit financially therefrom. Every public officer who violates this provision is guilty of a gross misdemeanor.