law: Trade Marks Act, 1999  
  12. Registration in the case of honest
  
  concurrent use, etc.— 
  In the case of honest concurrent use or of
  
  other special circumstances which in the opinion of the Registrar, make it
  
  proper so to do, he may permit the registration by more than one proprietor of
  
  the trade marks which are identical or similar (whether any such trade mark is
  
  already registered or not ) in respect of the same or similar goods or
  
  services, subject to such conditions and limitations, if any, as the Registrar
  
  may think fit to impose.