Wis. Stat. § 111.08: Financial reports to employees.

Every person acting as the representative of employees for collective bargaining shall keep an adequate record of its financial transactions and shall present annually to each member within 60 days after the end of its fiscal year a detailed written financial report thereof in the form of a balance sheet and an operating statement. In the event of failure of compliance with this section, any member may petition the commission for an order compelling such compliance. An order of the commission on such petition shall be enforceable in the same manner as other orders of the commission under this subchapter.