90Exception as to holidays on different days for different sets.
Where it is proved to the satisfaction of the Secretary of State that the customs or exigencies of the trade carried on in any class or description of factories so require, he may by regulations grant to factories of that class or description a special exception authorising the occupier of every such factory to allow all or any of the annual whole holidays on different days to any of the women and young persons employed therein, or to any sets of those women and young persons, instead of on the same days.