law: Transfer of Property Act, 1882
  65. Implied contracts by mortgagor
  In the absence of a contract to the contrary, the mortgagor
  
  shall be deemed to contract with the mortgagee,-
  (a) that the interest which the mortgagor professes to transfer
  
  to the mortgagee subsists, and that the mortgagor has power to transfer the
  
  same;
  (b) that the mortgagor will defend, or, if the mortgagee be in
  
  possession of the mortgaged property, enable him to defend, the mortgagor's
  
  title. thereto;
  (c) that the mortgagor will, so long as the mortgagee is not in
  
  possession of the mortgaged property, pay all public charges accruing due in
  
  respect of the property;
  (d) and, where the mortgaged property is a lease, that the rent
  
  payable under the lease, the conditions contained therein, and the contracts
  
  binding on the lessee have been paid, performed and observed down to the
  
  commencement of the mortgage; and that the mortgagor will, so long as the
  
  security exists and the mortgagee is not in possession of the mortgaged
  
  property, pay the rent reserved by the lease, or, if the lease be renewed, the
  
  renewed lease, perform the conditions contained therein and observe the
  
  contracts binding on the lessee, and indemnify the mortgagee against all the
  
  claims sustained by reason of the non-payment of the said rent or the
  
  non-performance or non-observance of the said conditions and contracts;
  (e) and, where the mortgage is a second or subsequent
  
  encumbrance on the property, that the mortgagor will pay the interest from time
  
  to time accruing due on such prior encumbrance as and when it becomes due, and
  
  will at the proper time discharge the principal money due on such prior
  
  encumbrance.
  The benefit of the contracts mentioned in this section shall be
  
  annexed to and shall go with the interest of the mortgagee as such, and may be
  
  enforced by every person in whom that interest is for the whole or any part
  
  thereof from time to time vested.