Ohio Rev. Code Ann. § 3331.07

When an age and schooling certificate is reissued, the pledge of the new employer shall be secured and filed. A physical fitness certificate from a physician, physician assistant, clinical nurse specialist, or certified nurse practitioner as described in division (A)(4) of section 3331.02 of the Revised Code shall also be secured and filed if the physical fitness certificate used in the issuing of the previously issued age and schooling certificate is no longer valid, as determined pursuant to division (B) of section 3331.02 of the Revised Code.