Ohio Rev. Code § 739.01: Payment of municipal indebtedness - sinking fund.

Municipal corporations having outstanding bonds or funded debts shall, through their legislative authorities, and in addition to all other taxes authorized by law, levy and collect annually a tax upon all the real and personal property in the municipal corporation sufficient to pay the interest and provide a sinking fund for the extinguishment of all bonds issued and funded debts incurred prior to August 17, 1921, and the taxes so raised shall be used for no other purpose.