Contra Costa California Pooling and Servicing Agreement is a legal document that outlines the terms and conditions for pooling and servicing mortgage loans between Credit Suisse First Boston Mortgage Securities Corp., Washington Mutual Bank F.A., and Bank One. This agreement is designed to facilitate the securitization and management of mortgage-backed securities. Keywords: Contra Costa California, Pooling and Servicing Agreement, Credit Suisse First Boston Mortgage Securities Corp., Washington Mutual Bank F.A., Bank One, mortgage loans, securitization, mortgage-backed securities. There might be different types of Contra Costa California Pooling and Servicing Agreements between the mentioned parties. Some potential variations of these agreements could include: 1. Standard Contra Costa California Pooling and Servicing Agreement: This is the basic agreement that outlines the general terms and conditions for pooling and servicing mortgage loans in Contra Costa County, California. 2. Contra Costa California Pooling and Servicing Agreement with Credit Suisse First Boston Mortgage Securities Corp.: This particular agreement may emphasize the partnership between Credit Suisse First Boston Mortgage Securities Corp. and the other parties involved. It might contain specific provisions that cater to the requirements and preferences of Credit Suisse First Boston Mortgage Securities Corp. 3. Contra Costa California Pooling and Servicing Agreement with Washington Mutual Bank F.A.: This type of agreement might focus on the collaboration and unique considerations related to Washington Mutual Bank F.A. It could include provisions specific to this institution's rights, responsibilities, and contributions to the pooling and servicing process. 4. Contra Costa California Pooling and Servicing Agreement with Bank One: This agreement could highlight the involvement of Bank One and its distinct requirements, roles, and responsibilities within the pooling and servicing arrangement. It might contain tailored provisions addressing Bank One's particular interests and contributions. These are hypothetical examples of potential variations of the Contra Costa California Pooling and Servicing Agreement. The actual agreements would depend on the specific details negotiated between the parties involved and may contain additional provisions as needed.