This Agreement may not be altered, amended, or modified except by a written instrument executed by or on behalf of CEOC and the Required Preferred Backstop Investors, provided that if any alteration, amendment or modification could be adverse to any of the Preferred Backstop Investors, such Preferred Backstop Investor’s written consent shall be required. This Agreement shall become binding only after the same is signed and delivered by or on behalf of each of the parties hereto.