law: The Motor Vehicles Act, 1988
  72.  Grant   of stage carriage permits.  
  Provided that no such permit shall be granted in respect of
  
  any route or area not specified in the application.
  Provided that  the attachment  of this condition to a permit
  
  shall not  prevent the  continued use,  for a period of two years from the 
  
  date of  publication of the approved specifications, of any vehicle operating
  
  on that date;
  Provided that  the  conditions  specified  in  pursuance  of
  
  clause (i)  shall not  be varied  so as  to  alter  the  distance covered by
  
  the original route by more than 24 kilometers, and any variation within  such 
  
  limits  shall  be  made  only  after the  Regional Transport Authority is satisfied that  such  variation will serve 
  
  the  convenience of the public and that it is not expedient to grant a separate
  
  permit  in respect of the original route as so varied or  any part thereof;