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.
R.C. §739.01