Section 23. With respect to the employment of children in factories the following provisions shall apply:

23. With respect to the employment of children in factories the following provisions shall apply:— (a) no child shall be employed in any factory unless he is in possession of a certificate granted under section 7 or section 8 showing that he is not less than nine years of age and is fit for employment in a factory and while at work carries either the certificate itself or a token giving reference to such certificate; (b) no child shall be employed in any factory before half-past five o'clock in the morning or after seven o'clock in the evening; (c) no child shall be employed in any factory for more than seven hours in any one day.