Ohio Rev. Code § 4909.24: Complaints and hearings.

Upon complaint of a person, firm, corporation, or association, of a mercantile, agricultural, or manufacturing society, or of a body politic or municipal organization, that any of the rates, fares, charges, or classifications, or any joint rates are in any respect unreasonable or unjustly discriminatory, or that any regulation or practice, affecting the transportation of persons or property, or any service in connection therewith, are in any respect unreasonable or unjustly discriminatory, or that any service is inadequate, the public utilities commission may notify the railroad complained of that complaint has been made, and ten days after such notice proceed to investigate such charges as provided in Chapters 4901., 4903., 4905., 4907., and 4909. of the Revised Code. Before making such investigation, the commission shall give the railroad and the complainants ten days' notice of the time and place such matters will be considered and determined, and such parties are entitled to be heard and to have process to enforce the attendance of witnesses.

A railroad may make complaint with like effect as though made by any person, firm, corporation, or association, mercantile, agricultural, or manufacturing society, body politic, or municipal organization.