The Developmental Disabilities Assistance and Bill of Rights Act (DD Act) was established to improve the lives of individuals with developmental disabilities by promoting their independence, integration, and participation in society. The act has undergone updates, including a 2015 final rule that alters funding allocations and structures for state councils, protection and advocacy systems, and university centers focused on developmental disabilities. Key changes emphasize accessibility, compliance with federal standards, and new funding measures aimed at underserved populations.