Subject to the provisions hereof, including, without limitation, the right to obtain prepayment of the Principal Amount provided herein, half of the Principal Amount together with all accrued but unpaid interest thereon as of and including the First Maturity Date, if any, shall be due and payable on the First Maturity Date and half of the Principal Amount together with all accrued but unpaid interest thereon as of and including the Final Maturity Date, if any, shall be due and payable on the Final Maturity Date.