Any amounts payable to Lender under this Guaranty shall become immediately due and payable on demand and, if not paid within ten (10) days of such demand therefor, shall bear interest at the lesser of (a) the Default Rate or (b) the Maximum Legal Rate which Guarantor may by law pay or Lender may charge and collect, from the date payment was due, provided that the foregoing shall be subject to the provisions of Article 10 of the Note.