law: Companies Act, 1956
  Sec 50    -     Power
  
  for company to have official seal for use outside India. 
  (1) A company whose objects require or
  
  comprise the transaction of business outside India may, if authorized by its
  
  articles, have for use in any territory, district or place not situate in India
  
  an official seal which shall be a facsimile of the common seal of the company,
  
  with the addition on its face of the name of the territory, district or place
  
  where it is to be used.
  (2) A company having an official seal for use
  
  in any such territory, district or place may, by writing under its common seal,
  
  authorize any person appointed for the purpose in that territory, district or
  
  place to affix the official seal to any deed or other document to which the
  
  company is a party in that territory, district or place.
  (3) The authority of any agent authorized
  
  under sub-section (2) shall, as between the company and any person dealing with
  
  the agent, continue during the period, if any, mentioned in the instrument
  
  conferring the authority, or if no period is there mentioned, until notice of
  
  the revocation or determination of the agent's authority has been given to the
  
  person dealing with him.
  (4) The person affixing any such official seal
  
  shall, by writing under his hand, certify on the deed or other document to
  
  which the seal is affixed, the date on which and the place at which, it is
  
  affixed.
  (5) A deed or other document to which an
  
  official seal is duly affixed shall bind the company as if it had been sealed
  
  with the common seal of the company.