law: Petroleum Act, 1934
  14. Inspection and sampling of petroleum
  (1) The Central Government may, by notification in the Official Gazette,
  
  authorize any officer by name or by virtue of office to enter any place where
  
  petroleum is being imported, transported, stored, produced, refined or blended
  
  and to inspect and take samples for testing of any petroleum found therein.
  (2) The Central Government may make rules-
  (a) regulating the taking of samples of
  
  petroleum for testing,
  (b) determining the cases in which payment
  
  shall be made for the value of samples taken, and the mode of payment,
  
  and 
  (c) generally, regulating the procedure of
  
  officers exercising powers under this section.