Minn. Stat. § 441.55
Any holder of a bond or bonds, or any of the coupons of any bond or bonds, issued under the provisions of sections 441.47 to 441.55 may, either in law or in equity, by suit, action, mandamus, or other proceedings, enforce or compel the performance of all duties required by these sections, including the fixing, maintaining, and collecting of such rates of toll or charges for the use of any such bridges and approaches thereto as will be sufficient for all the purposes provided by these sections and the application of the income and revenue thereof. All bonds of the same authorization issued under the provisions of these sections shall enjoy equal rights in respect of the revenues of any such bridges, regardless of the time of actual issuance or delivery thereof.
Minn. Stat. § 441.55
1941 c 286 s 9