Ohio Revised Code Title XXI. Courts Probate Juvenile § 2151.233

(A) Except as provided in division (B) of this section, the juvenile court shall not exercise jurisdiction under division (A)(2), (A)(11), or (B)(4) of section 2151.23 of the Revised Code or section 2151.231 of the Revised Code and the domestic relations court shall have jurisdiction to determine custody or support regarding a child if any of the following apply:

(B) Division (A) of this section does not apply to any case or proceeding brought under Chapter 3115. of the Revised Code, or to any case or proceeding initiated or originating outside of this state.

(C) This section shall apply to all cases and proceedings initiated on or after March 22, 2019.

(D) As used in this section and sections 2151.234 to 2151.236 of the Revised Code, “domestic relations court” means the division of a court of common pleas that has domestic relations jurisdiction.