Ohio Rev. Code § 5555.46
All assessments, with interest accrued on them, made under sections 5555.01 to 5555.72 of the Revised Code shall be placed by the county auditor upon a special duplicate to be collected as taxes, and the principal of the assessments shall be payable in not more than forty semiannual installments extending over a period of not more than twenty years, as determined by the board of county commissioners. If any assessment is twenty-five dollars or less, or if the unpaid balance of any assessment is twenty-five dollars or less, it shall be paid in full, and not in installments, at the time the first or next installment would otherwise become due and payable.
If public obligations are issued or incurred to pay the costs of the improvement, the principal sum of the assessments shall be payable in a number of semiannual installments that will provide a fund for the redemption of the public obligations so issued or incurred. The assessments shall bear interest from the date of the issuance of the public obligations and at the same rate or rates as the public obligations, and the interest shall be collected in the same manner as the principal of the assessments.
R.C. §5555.46