Section 44. Working hours for adolescents not certified lo be fit for work as adults— (1) No adolescent who ha

44. Working hours for adolescents not certified lo be fit for work as adults— (1) No adolescent who has nnt been grunted a medical certificate, certifying that ha is fit for work as an adult shall be employed or permitted to be employed above ground or in any workshop or power station in a mine or in any open cast workings in a mine— (<•() for more than four and a half hours in any day; or (b) between tha hours of 6 P.M. and 6 A.M. (2) Thn periol of work of all such adolescents employed in a mine shall bo limited to two shifts which shall not overlap or spread over more than five hours each, and each such adolescent shalj be employed in only one of the relays which shall not, except with the previous permission in writing of the Chief Inspector, be changed moie frequently than once in a period of thirty days. (3) Tho provisions of section 28 shall npply to such adolescents and notwithstanding anything contained in sub-section (]) of section 38 or in section 89, no exemption from the provisions of section 28 shall be granted ID respect of any adolescent,