Section 83 Exception as to hour of commencement of period of employment.
Where the Secretary of State is satisfied that the exigencies of the trade carried on in any factory or class or description of factory or the convenience of the persons employed therein so require, he may—
(a)
in the case of any class or description of factory, by regulations; or
(b)
in the case of any factory, by order;
allow the period of employment for women and young persons as respects either the whole factory or any part thereof or any set of persons employed therein and either for the whole year or for any part of the year to begin at an hour earlier than seven o'clock in the morning but not earlier than six o'clock in the morning.