Oregon Revised Statutes Labor and Employment; Unlawful Discrimination § 653.310

No child under 18 years of age shall be employed or permitted to work in any employment listed in ORS 653.320 (2) unless the person employing the child keeps on file and accessible to the school authorities of the district where such child resides, and to the police and the Bureau of Labor and Industries, an annual employment certificate as prescribed by the rules adopted by the bureau pursuant to ORS 653.307 and keeps a complete list of all such children employed therein.