Ohio Rev. Code Ann. § 5816.10
(D) A disposition to any nonqualified trustee of a legacy trust shall be treated as a qualified disposition if at the time of the disposition any of the following applies:
(E) If a disposition is made by a trustee of a nonlegacy trust to a trustee of a legacy trust, both of the following apply:
(H) To the maximum extent permitted by the Ohio Constitution and the United States Constitution, the courts of this state shall exercise jurisdiction over any legacy trust or any qualified disposition and shall adjudicate any case or controversy brought before them regarding, arising out of, or related to, any legacy trust or any qualified disposition if that case or controversy is otherwise within the subject matter jurisdiction of the court. Subject to the Ohio Constitution and the United States Constitution, no court of this state shall dismiss or otherwise decline to adjudicate any case or controversy described in this division on the ground that a court of another jurisdiction has acquired or may acquire proper jurisdiction over, or may provide proper venue for, that case or controversy or the parties to the case or controversy. Nothing in this division shall be construed to do either of the following: