Ind. Code § 8-4-17-1

Sec. 1. Every railroad corporation incorporated under IC 8-4-1 and every railroad corporation owning any railroad or the franchises thereof created under any law of this state, and the vendee, lessee, or other party owning, running, controlling, or operating any railroad into or through this state, shall file, on July 1 of each year, the name and address of a resident agent with the Indiana department of transportation. Service of process on the resident agent shall be deemed notice to the railroad company.