Ohio Rev. Code § 1311.42
To perfect a lien referred to in section 1311.41 of the Revised Code, a person performing labor, furnishing material, or boarding, within forty days from the date that the person ceased performing labor, or furnishing materials, or boarding on or for the railroad, shall file with the county recorder of the county where the labor was performed, or material or boarding furnished, an affidavit containing an itemized statement of the kind and amount of material furnished, or labor performed, the time when the contractor or subcontractor for whom, and the section and place where, on the line of the road the labor was performed, or material furnished, and the amount due therefor, after deducting all payments and setoffs. In case of boarding, such affidavit must have attached thereto an itemized account thereof, showing the name of the contractor or subcontractor on whose order it was furnished, the several persons to whom furnished, the weekly rate of boarding, and the several amounts unpaid by each respectively. On filing the affidavit, it shall be recorded in the official records of the county recorder, and then it operates as a lien on the railroad, in the manner and subject only to the limitations provided in sections 1311.39 to 1311.47 of the Revised Code.
R.C. § 1311.42