71Certain covenants void

71 Certain covenants void A covenant, stipulation or condition contained in a mortgage— (a) whereby the money secured by the mortgage becomes due and payable; or (b) whereby a power of sale or entry into possession becomes exercisable; or (c) adversely affecting, or likely to affect adversely, the estate or interest of the mortgagor; in the event of the public trustee and guardian becoming entitled, in any capacity, to administer the estate of the mortgagor or of the estate of the mortgagor coming under the control of the public trustee and guardian, is null and void.