Ohio Revised Code Title XLI. Labor and Industry § 4113.10

A child working in or in connection with a factory, workshop, business office, telephone or telegraph office, restaurant, bakery, hotel, apartment house, or mercantile or other establishment, or in the distribution or transmission of merchandise or messages, who appears to an inspector of workshops and factories to be under the legal age, or refuses to give to such inspector his name, age, and place of residence, shall be forthwith conducted by such inspector to the office of the juvenile judge or the probate judge for examination. If such inspector is in doubt as to the physical fitness of a boy under sixteen years of age or a girl under eighteen years of age found working in or in connection with any of such establishments, or in the distribution or transmission of merchandise or messages, he shall require a certificate signed by a medical officer of the board of health certifying that such child is of sound health and physically able to perform the work or service such child is required to do. Such certificate shall be signed by the child in whose name it is issued in the presence of the officer issuing it, and such examination shall be made and certificate issued without expense to said child.