Ohio Rev. Code § 3331.06: Limited certificates.

The age and schooling certificate provided in sections 3331.01 to 3331.04 of the Revised Code shall be issued only with the word "limited" printed, marked, or stamped thereon if the medical certificate provided in section 3331.02 or 3331.07 of the Revised Code is a limited certificate, and in that case, the particular employment to which it is limited shall be stated in the certificate, and the certificate cannot serve as the legal age and schooling certificate for employment in another occupation.