Ohio Rev. Code Ann. § 3115.502
(C) Except as otherwise provided in division (D) of this section and section 3115.503 of the Revised Code, the employer or other payor shall withhold and distribute the funds as directed in the withholding order by complying with terms of the order that specify any of the following:
(D) An employer or other payor shall comply with the law of the state of the obligor's principal place of employment for withholding from income with respect to all of the following: