law: Telecom Regulatory Authority of India Act,1997
  12. Powers of Authority to call for information, conduct
  
  investigations, etc.
  (1) Where the Authority considers it expedient so to do, it may,
  
  by order in writing-
  (a) call upon any service provider at any time
  
  to furnish in writing such information or explanation relating to its affairs
  
  as the Authority may require; or
  (b) appoint one or more persons to make an
  
  inquiry in relation to the affairs of any service provider; and
  (c) direct any of its officers or employees to
  
  inspect the books of account or other documents of any service provider.
  (2) Where any inquiry in relation to the affairs of a service
  
  provider has been undertaken under sub-section (1)-
  (a) every office of the government department,
  
  if such service provider is a department of the government;
  (b) every director, manager, secretary or
  
  other officer, if such service provider is a company; or
  (c) every partner, manager, secretary or other
  
  officer, if such service provider is a firm; or
  (d) every other person or body of persons who
  
  has had dealings in the course of business with any of the persons mentioned in
  
  clauses (b) and (c), shall be bound to produce before the Authority making the
  
  inquiry, all such books of account or other documents in his custody or power
  
  relating to, or having a bearing on the subject-matter of such inquiry and also
  
  to furnish to the Authority with any such statement or information relating
  
  thereto, as the case may be, required of him, within such time as may be specified.
  
  
  (3) Every service provider shall maintain such books of account
  
  or other documents as may be prescribed.
  (4) The Authority shall have the power to issue such directions
  
  to service providers as it may consider necessary for proper functioning by
  
  service providers.