K.S.A. 38-608

That the permits provided for under this act shall be issued upon blanks furnished by the state labor commissioner and shall be made out in duplicate; one of such duplicates shall be forthwith returned to the state labor commissioner, by the party issuing the same, with a statement of the character and substance of the evidence offered prior to the issuance of such permit. Such permit shall be sufficient protection to the employer of any child as to the age of such child, except when such employer has actual knowledge of the falsity of such permit.