Ohio Rev. Code Ann. § 3319.221
(A) The state board of education, the department of education, any city, local, exempted village, and joint vocational school district board of education, and any other public school, as defined in section 3301.0711 of the Revised Code, shall not require a separate pupil services license issued by the state board as a credential for working in a public school, on either a permanent basis or a substitute or other temporary basis, for the following licensed professionals: