Ohio Rev. Code § 3513.141: Ranked choice voting in primaries prohibited.

(A) Except as otherwise permitted under Article X or Article XVIII, Ohio Constitution, no primary election shall be conducted in this state using ranked choice voting or instant runoff voting.

(B) If the secretary of state determines that a county or municipal corporation has, by resolution or ordinance, approved the use of ranked choice voting or instant runoff voting in a primary election, then the county or municipal corporation is ineligible to receive any local government fund distributions from the state during the period beginning with the month following the adoption of the resolution or ordinance and ending with the month following the last day it is in effect. Upon making that determination, the secretary of state promptly shall notify the tax commissioner of the county or municipal corporation's ineligibility.

(C) Upon determining that a county or municipal corporation has, by resolution or ordinance, rescinded previous approval for the use of ranked choice voting that resulted in notice to the tax commissioner under division (B) of this section, the secretary of state shall promptly notify the tax commissioner of the rescission.