No adolescent shall be required or allowed to work as a motor transport worker in any motor transport undertaking unless-- (a) a certificate of fitness granted with reference to him under section 23 is in the custody of the employer; and (b) such adolescent carries with him while he is at work a token giving a reference to such certificate.
<span style="margin-left:15px;"></span>No adolescent shall be required or allowed to work as a motor transport worker in any motor transport undertaking unless--<br> <span style="margin-left:15px;"></span><span style="margin-left:15px;"></span> (a) a certificate of fitness granted with reference to him under section 23 is in the custody of the employer; and<br> <span style="margin-left:15px;"></span><span style="margin-left:15px;"></span> (b) such adolescent carries with him while he is at work a token giving a reference to such certificate.<br><br>