Ohio Rev. Code § 5528.34
The commissioners of the sinking fund shall, on or before the fifteenth day of January of each calendar year, certify to the treasurer of state the total amount of moneys required during the current calendar year to meet in full all payments of interest, principal, and charges due and payable in that calendar year for the retirement of highway obligations, including deposits required by the second paragraph of section 5528.31 of the Revised Code, after deducting from such total amount the principal of notes which the commissioners of the sinking fund certify will be paid from the proceeds of bonds or renewal notes, issued pursuant to Section 2i of Article VIII, Ohio Constitution and sections 5528.30 and 5528.31 of the Revised Code.
R.C. § 5528.34