Tenn. Code Ann. § 7-51-801

All incorporated cities and towns, as well as any areas adopting a metropolitan government within the state, shall file with the commissioner of transportation certified copies of all ordinances adopted by the governing body of such city, town or metropolitan government after July 1, 1983, that affect the operation of trains within the limits, or newly extended limits, when any such ordinances enlarge the municipal boundaries of such city, town or metropolitan government.