(1) In every factory wherein more than one hundred and fifty workers are ordinarily employed, adequate and suitable shelters or rest rooms and a suitable lunch room, with provision for drinking water, where workers can eat meals brought by them, shall be provided and maintained for the use of the workers:
     Provided that any canteen maintained in accordance with the provisions of section 46 shall be regarded as part of the requirements of this sub-section:
     Provided further that where a lunch room exists no worker shall eat any food in the work room.
     (2) The shelters or rest rooms or lunch rooms to be provided under sub-section (1) shall be sufficiently lighted aid ventilated and shall be maintained in a cool and clean condition.
     (3) The State Government may--
         (a) prescribe the standards in respect of construction, accommodation, furniture and other equipment of shelters, rest rooms and lunch rooms to be provided under this section;
         (b) by notification in the Official Gazette, exempt any factory or class or description of factories from the requirements of this section.