The provisions of this Registration Rights Agreement may only be amended by the written consent of the Company and the Demand Holders (if the Demand Holders then own Registrable Securities); provided, however , that any amendment that has an adverse effect on the rights of, or imposes additional obligations on, the Holders other than the Demand Holders shall require the consent of such Holders other than the Demand Holders that hold in the aggregate at least 50% of the Registrable Securities then held by such Holders (if such Holders then own Registrable Securities). The Holders acknowledge and agree that any Person that becomes a Stockholder shall have the rights and obligations set forth in this Registration Rights Agreement and that such Person becoming a Stockholder shall be deemed not to be an amendment to this Registration Rights Agreement.