Ohio Revised Code Title LIII. Real Property § 5311.041

(B)(1) The declaration, either as filed and recorded by the declarant pursuant to section 5311.06 of the Revised Code or as amended by a vote of the unit owners exercising not less than ninety per cent of the voting power of the unit owners association, may provide that, regardless of undivided interests, the following common expenses shall be computed on an equal per unit basis:

(2) Expenses not included in division (B)(1) of this section shall be computed on the basis of the undivided interest in the common elements allocated to each unit.