Minn. Stat. § 375.81: APPROPRIATION; BOND.

The appropriation shall be paid on the county auditor's warrant to the person in charge of the exhibit after filing a bond with the auditor in double the amount of the appropriation, on the condition that the appropriation is properly disbursed for the purpose intended, and that a true account is made to the county board as provided in section 375.82. The auditor shall approve the bond.