Ohio Rev. Code Ann. § 153.694

If a professional design firm selected as the criteria architect or engineer creates the preliminary criteria and design criteria for a project and provides professional design services to a public authority to assist that public authority in evaluating the design-build requirements provided to the public authority by a design-build firm pursuant to section 153.692 of the Revised Code, that professional design firm shall not provide any design-build services pursuant to the design-build contract under section 153.693 of the Revised Code for the project for which the professional design firm was selected as the criteria architect or engineer.