(1) In every place wherein, more than fifty female building workers are ordinarily employed, there shall be provided and maintained a suitable room or rooms for the use of children under the age of six years of such female workers.
     (2) Such rooms shall--
         (a) provide adequate accommodation;
         (b) be adequately lighted and ventilated;
         (c) be maintained in a clean and sanitary condition;
         (d) be under the charge of women trained in the care of children and infants.