Ohio Rev. Code Ann. § 3905.63
(A) If, in any calendar year, the aggregate amount of gross written premium on business placed with a controlled insurer by a controlling producer is equal to or greater than five per cent of the admitted assets of the insurer, as reported in the insurer's quarterly statement filed as of the thirtieth day of September of the immediately preceding year, all of the following apply:
(1) The controlled insurer shall not accept business from the controlling producer and the controlling producer shall not place business with the controlled insurer, unless there is a written contract between the producer and the insurer specifying the responsibilities of each party, which contract has been approved by the board of directors of the insurer and contains at least the following provisions:
(B) Division (A) of this section does not apply if both of the following conditions are met: