Ohio Revised Code Title XLIX. Public Utilities § 4909.22

When passengers or property are transported over two or more connecting railroads between points in this state, and the railroad companies have made joint rates for the transportation of such passengers or property, such rates and all charges in connection therewith shall be just and reasonable. Every unjust and unreasonable charge is prohibited. A less charge by each of such railroads for its proportion of such joint rates than is made locally between the same points on their respective lines is not for that reason a violation of Chapters 4901., 4903., 4905., 4907., and 4909. of the Revised Code and does not render such railroads liable to any of the penalties in such chapters.