Section 4. Night-Work; Prohibition In Manufacturing Establishments.--Females over eighteen (18) years of age may be employed in manufacturing establishments during any hours, night or day, so long as there is compliance with the provisions of this act. The employment of females on second (evening) and third (night) shifts, however, is subject to prior approval by the Secretary of Labor and Industry in accordance with regulations issued by the secretary with the approval of the Industrial Board.
(4 amended Dec. 1, 1965, P.L.1012, No.376)