WASHINGTON MUTUAL MORTGAGE SECURITIES CORP., as Depositor and WASHINGTON MUTUAL BANK as Servicer and LASALLE BANK NATIONAL ASSOCIATION, as Trustee and CHRISTIANA BANK & TRUST COMPANY, as Delaware Trustee POOLING AND SERVICING AGREEMENT...Pooling and Servicing Agreement • September 9th, 2005 • WaMu Mortgage Pass-Through Certificates, Series 2005-Ar12 • Asset-backed securities • Delaware
This Pooling and Servicing Agreement, dated and effective as of August 1, 2005 (this “Agreement”), is executed by and among Washington Mutual Mortgage Securities Corp., as depositor (the “Company”), Washington Mutual Bank, as Servicer (the "Servicer"), LaSalle Bank National Association, a national banking association with a corporate trust office at 135 South LaSalle Street, Suite 1625, Chicago, Illinois 60603, as Trustee (the “Trustee”), and Christiana Bank & Trust Company, as Delaware Trustee (the “Delaware Trustee”). Capitalized terms used in this Agreement and not otherwise defined have the meanings ascribed to such terms in Article I hereof.
