Except as permitted herein, neither Seller nor any Servicer shall sell, assign, transfer or otherwise dispose of, or grant any option with respect to, or pledge, hypothecate or grant a security interest in or lien on or otherwise encumber (except pursuant to the Program Agreements), any of the Purchased Mortgage Loans or any interest therein, provided that this Section shall not prevent any transfer of Purchased Mortgage Loans in accordance with the Program Agreements.