Each mortgagee with respect to a mortgage under this part shall at or before closing with respect to any such mortgage, provide the mortgagor with written notice in a form prescribed by the Commissioner describing any requirements the mortgagor must fulfill upon prepayment of the principal amount of the mortgage to prevent the accrual of any interest on the principal amount after the date of such prepayment. This paragraph shall apply to any mortgage executed after August 22, 1991, and before January 21, 2015.