Ohio Rev. Code Ann. § 4749.09

Any class A, B, or C licensee, or registered employee of a class A, B, or C licensee, who operates in a municipal corporation that provides by ordinance for the licensing, registering, or regulation of private investigators, security guard providers, or their employees shall conform to those ordinances insofar as they do not conflict with this chapter. No license or registration fees shall be charged by the state or any of its subdivisions for conducting the business of private investigation, the business of security services, or both businesses other than as provided in this chapter.