law: Employees’ State Insurance Act, 1948
  45. Inspectors, their functions and duties
  (1) The Corporation may appoint such persons as Inspectors, as
  
  it thinks fit, for the purposes of this Act, within such local limits as it may
  
  assign to them.
  (2) Any Inspector appointed by the Corporation under sub-section
  
  (1) (hereinafter referred to as Inspector), or other official of the
  
  Corporation authorized in this behalf by it may, for the purposes of enquiring
  
  into the correctness of any of the particulars stated in any return referred to
  
  in section 44 or for the purpose of ascertaining whether any of the provisions
  
  of this Act has been complied with-
  (a) require any principal or immediate
  
  employer to furnish to him such information as he may consider necessary for
  
  the purposes of this Act; or
  (b) at any reasonable time enter any office,
  
  establishment, factory or other premises occupied by such principal or
  
  immediate employer and require any person found in charge thereof to produce to
  
  such Inspector or other official and allow him to examine such accounts, books
  
  and other documents relating to the employment of persons and payment of wages
  
  or to furnish to him such information as he may consider necessary; or
  (c) examine, with respect to any matter
  
  relevant to the purposes aforesaid, the principal or immediate employer, his
  
  agent or servant, or any person found in such factory, establishment, office or
  
  other premises, or any person whom the said Inspector or other official has
  
  reasonable cause to believe to be or to have been an employee;
   39  [(d) make copies of, or take extracts from,
  
  any register, account book or other document maintained in such factory,
  
  establishment, office or other premises;
  (e) exercise such other powers as may be
  
  prescribed.]
  (3) An Inspector shall exercise such functions and perform such
  
  duties as may be authorized by the Corporation or as may be specified in the
  
  regulations.