Okla. Stat. tit. 40 § 77
Before any child under the age of sixteen (16) years shall be employed in any occupation specified in Section 71 of this title, it shall be the duty of the parent or guardian of such child to procure and furnish the employer of such child an age and schooling certificate as hereinafter provided in this article. It shall be the duty of every person, firm or corporation owning or operating any of the establishments specified in Section 71 of this title, or employers in such occupation, to keep on file for the inspection of the Commissioner or his designee, truant officers, or other persons charged with the administration of this article, such age and schooling certificate, for every child under sixteen (16) years of age employed in such occupation, and to keep on file where such children are employed a register with a complete list of children under sixteen (16) years of age so employed, together with the age of each child as set forth in the age and schooling certificate opposite the name of such child, and also to keep on file in such place or establishment, in such form as the Commissioner or his designee may prescribe, the time of opening and closing of such factory or other establishment, the number of hours of labor required or permitted in such establishment, the hours of commencing and stopping work, and the time allowed for meals, and, if there be two or more shifts in such establishment, the number of hours in each shift during which the employees are required or permitted to work. On termination of the employment of a child so registered, and whose certificate is so filed, such certificate shall be forthwith surrendered by the employer to the child or its parent, guardian or custodian; provided that this section shall not apply to the employment of children who are not residents of the State of Oklahoma, to perform in any duly licensed theatre, motion picture theatre or other place of public amusement.
Okla. Stat. tit. 40, § 77