The execution, delivery and performance of this Agreement has been duly authorized by each Stone Noteholder. This Agreement, when executed and delivered by each Stone Noteholder in accordance with the respective terms hereof, shall constitute a valid and binding obligation of such Stone Noteholder, enforceable against such Stone Noteholder in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, moratorium, reorganization or similar laws affecting creditors’ rights generally and by general equitable principles.