Exhibit 4.1(b) TWELFTH AMENDMENT TO THE POOLING AND SERVICING AGREEMENT TWELFTH AMENDMENT TO POOLING AND SERVICING AGREEMENT, dated as of April 25, 2001 (this "Amendment"), by and between FIRST USA BANK, NATIONAL ASSOCIATION, as Transferor and...Pooling and Servicing Agreement • June 29th, 2001 • First Usa Credit Card Master Trust • Asset-backed securities • Delaware
