70 ILCS 2805/26g

Any holder of any bond or bonds issued under this Act, or of any of the coupons appertaining thereto, may, by mandamus, injunction or other civil action, enforce and compel the performance of all duties required by Sections 26a to 26m, inclusive, of this Act, including the making and collection of sufficient rates for the specified purposes provided by said sections and the proper application of the income therefrom.