Where in any factory more than twenty persons are employed in the same building above the first floor or more than twenty feet above the ground level, or explosive or highly inflammable materials are stored or used in any building where persons are employed, effective steps shall be taken to ensure that all the persons employed are familiar with the means of escape in case of fire and their use and with the routine to be followed in case of fire.

The Secretary of State may make regulations as to the steps to be taken for the said purposes in such factories as aforesaid, or any class or description thereof.