Ohio Rev. Code Ann. § 4921.19
(A) Every for-hire motor carrier operating in this state shall, at the time of the issuance of a certificate of public convenience and necessity under section 4921.03 of the Revised Code, pay to the public utilities commission, for and on behalf of the treasurer of state, the following taxes:
(B) Every for-hire motor carrier operating in this state solely in intrastate commerce shall, annually between the first day of May and the thirtieth day of June, pay to the commission, for and on behalf of the treasurer of state, the following taxes:
(H)
(1) The fees for uniform registration and a uniform permit as a carrier of hazardous materials pursuant to section 4921.15 of the Revised Code shall consist of the following:
(b) An apportioned per-truck registration fee, which shall be calculated by multiplying the percentage of a registrant's activity in this state times the percentage of the registrant's business that is hazardous-materials-related, times the number of vehicles owned or operated by the registrant, times a per-truck fee determined by order of the commission following public notice and an opportunity for comment.