law: Indian Easements Act, 1882
  19. Transfer of dominant heritage passes easement
  Where the dominant heritage is transferred or devolves, by act
  
  of parties or by operation of law, the transfer or devolution shall, unless a
  
  contrary intention appears, be deemed to pass the easement to the person in
  
  whose favor the transfer or devolution takes place.
  Illustration
  A has certain land to which a right of way is annexed. A lets
  
  the land to B for twenty years. The right of way vests in B and his legal
  
  representatives so long as the lease continues.