Ohio Revised Code Title XLIX. Public Utilities § 4963.35

(A) No person operating a railroad shall operate a diesel locomotive engine, other than a turbocharged locomotive, used for the railroad or in the construction or repairing of the railroad, unless the locomotive has a properly installed and maintained spark arrester that complies with the standards and recommended practices for spark arresters for nonturbocharged diesel engines used in railroad locomotives, as set out in the association of American railroad's manual of standards and recommended practices and any revisions thereof.

(B) Whoever violates this section shall be fined no more than five hundred dollars for each violation. The court may enjoin the person from operating a locomotive not provided with a spark arrester installed and maintained as required by this section.

(C) The public utilities commission or any law enforcement officer for any county in which the railroad operates shall enforce this section in any court of competent jurisdiction.

(D) Any locomotive shall be exempt from the provisions of this section if it is being used exclusively in industrial plants or in yard service, or being used exclusively in connection with switching service on any track outside the boundaries of the plant or yard, unless the condition of the right of way of the track or the condition of adjoining land or property presents a potential fire hazard.