Transfer of Property Act, 1882
66. Waste by mortgagor in possession
A mortgagor in possession of the mortgaged property is not
liable to the mortgagee for allowing the property to deteriorate; but he must
not commit any act which is destructive or permanently injurious thereto, if
the security is insufficient or will be rendered insufficient by such act.
Explanation: A security is insufficient within the meaning
of this section unless the value of the mortgaged property exceeds by
one-third, or, if consisting of buildings, exceeds by one-half, the amount for
the time being due on the mortgage.