Wis. Stat. § 229.71: Dissolution of a district.

Upon or after the expiration or termination of all lease arrangements between the district and a professional baseball team with respect to the baseball park facilities, and subject to providing for the payment of its bonds, including interest on the bonds, and the performance of its other contractual obligations, a district may be dissolved by the action of the district board. If the district is dissolved under this section or by action of the legislature, the property of the district shall be transferred to the state.