law: Code of Civil Procedure, 1908
  77.Letter of request.-
  In lieu of issuing a
  
  commission the Court may issue a letter to examine a witness residing at any
  
  place not within {Subs. by Act 2 of 1951, s.3, for "the States".}
  
  [India].
  {Subs. by s.11, ibid.,
  
  for the former section.} [78.Commissions issued by foreign Courts.- Subject to
  
  such conditions and limitations as may be prescribed, the provisions as to the
  
  execution and return of commissions for the examination of witnesses shall
  
  apply to commissions issued by or at the instance of-
  (a) Courts situate in
  
  any part of India to which the provisions of this Code do not extend; or
  (b) Courts established
  
  or continued by the authority of the Central Government outside India; or
  (c) Courts of any
  
  State or country outside India.]