Minn. Stat. § 231.24: COMPLAINT THAT RATE IS UNREASONABLE; DUTY OF DEPARTMENT.

Upon verified complaint of any person or of any corporation that any rates of a household goods warehouse operator are unjust, unreasonable, discriminatory, preferential, or in any way in violation of law, the department shall proceed to investigate the matters alleged in such complaint; and, for the purposes of such investigation, they may require the attendance of witnesses and the production of books, papers, and documents. If, upon the hearing, such rates are found to be unjust, unreasonable, discriminatory, preferential, or in any way in violation of law, the department shall make an order, stating wherein the same are so unjust, unreasonable, discriminatory, preferential, or in any way in violation of law, and make rates which shall be substituted for those as to which complaint is made. Rates so made by the department shall be deemed prima facie reasonable in all courts, and shall be in full force during the pendency of any appeal or other proceedings to review the action of the department in establishing the same.