This bill amends the Justice for United States Victims of State Sponsored Terrorism Act to establish an additional lump sum catch-up payment for specific eligible claimants. The legislation directs the Special Master to notify individuals of their eligibility and the process for claiming these payments within 90 days of the Act's enactment. Payments are to be made within 90 days of the Special Master receiving eligibility information, with necessary funds appropriated from the Treasury. Eligible claimants are defined as those who have not received a prior specific payment, meet certain criteria related to victims of state-sponsored terrorism, and have claims based on qualifying judgments. Crucially, eligibility also extends to individuals determined as claimants under the Air Transportation Safety and System Stabilization Act or spouses/dependents under 28 CFR 104.44, indicating a focus on 9/11 victims .