law: Factories Act, 1948 
  91. Power to take samples 
  (1) An Inspector may at any time during the normal working hours
  
  of a factory, after informing the occupier or manager of the factory or other
  
  person for the time being purporting to be in charge of the factory, take in
  
  the manner hereinafter provided a sufficient sample of any substance used or
  
  intended to be used in the factory, such use being- 
  (a) in the belief of the Inspector in
  
  contravention of any of the provisions of this Act or the rules made  thereunder , or
  (b) in the opinion of the Inspector likely to
  
  cause bodily injury to, or injury to the health of, workers in the factory.
  (2) Where the Inspector takes a sample under sub-section (1), he
  
  shall, in the presence of the person informed under that sub-section unless
  
  such person willfully absents himself, divide the sample into three portions
  
  and effectively seal and suitably mark them, and shall permit such person to
  
  add his own seal and mark thereto.
  (3) The person informed as aforesaid shall, if the Inspector so
  
  requires, provide the appliances for dividing, sealing and marking the sample
  
  taken under this section.
  (4) The Inspector shall- 
  (a) forthwith give one portion of the sample
  
  to the person informed under sub-section (1);
  (b) forthwith send the second portion to a
  
  Government Analyst for analysis and report thereon;
  (c) retain the third portion for production to
  
  the Court before which proceedings, if any, are instituted in respect of the
  
  substance.
  (5) Any document purporting to be a report under the hand of any
  
  Government Analyst upon any substance submitted to him for analysis and report
  
  under this section, may be used as evidence in any proceedings instituted in
  
  respect of the substance.