Ind. Code § 8-2-20-1

Sec. 1. The various railroad corporations doing business within the state of Indiana shall not, at any time, increase or advance their rates of freight, or charge for the transportation thereof from one (1) point to another a sum greater than the rate of freight or charge for transportation asked or charged by said railroad corporations at the time such freight is offered or tendered to said railroad corporations for transportation, and all statutes in effect on March 16, 1867, conflicting with the provisions of this chapter are hereby repealed.