§ 3-109. Payment of wages to minor; when valid. Where a minor is in
the employment of a person other than his parent or guardian, payment to
such minor of his wages is valid, unless such parent or guardian notify
the employer in writing, within thirty days after the commencement of
such service, that such wages are claimed by such parent or guardian,
but whenever such notice is given at any time payments to the minor
shall not be valid for services rendered thereafter.