46:9-3.Ā  Covenant as to taxes paid
A covenant by the mortgagor in a mortgage,Ā  "That no owner of the mortgagedĀ  property shall be entitled to any credit by reason of the payment of any taxĀ  thereon"Ā  shall be construed to mean that the mortgagor, for himself, hisĀ  heirs, executors, administrators, successors and assigns, covenants with theĀ  holder of the mortgage that he and they will not, by reason of the payment ofĀ  any tax, assessment or other municipal charge or imposition, claim any creditĀ  on account of the principal or interest due or to grow due on said mortgage orĀ  the bond or obligation intended to be secured thereby, and that should saidĀ  mortgagor, his heirs, executors, administrators, successors or assigns, fail toĀ  pay any tax, assessment or other governmental charge, then and in that eventĀ  the holder of the mortgage may at his option pay such tax, assessment or otherĀ  governmental charge and the amount when so paid shall be added to and becomeĀ  part of the principal sum then due upon the bond or obligation referred to inĀ  said mortgage, and be secured by said mortgage and shall be payable on demand with legal interest.