The Preventing Adverse Childhood Experiences Act establishes a federal grant program administered by the Centers for Disease Control and Prevention to help states, territories, tribes, and local governments prevent traumatic childhood experiences and promote positive ones. The legislation targets traumatic events like abuse, neglect, witnessing violence, and exposure to parental substance abuse or incarceration, while also funding research on how these experiences affect long-term health outcomes. Grant recipients can use funding to develop evidence-based prevention programs, improve data collection on childhood experiences, and coordinate prevention efforts across multiple sectors and organizations. The bill authorizes funding for five fiscal years from 2024 through 2028, with the Secretary required to report annually on program performance to Congress. The legislation gives priority consideration to tribal organizations and entities with prior experience in preventing adverse childhood experiences.