10 CFR 950.32: Final determination on covered events.

(a) If the parties reach a Final Determination on Covered Events through mediation, or Summary Binding Decision as set forth in this subpart, the Final Determination on Covered Events is a final settlement of the issue, made by the sponsor and the Program Administrator. The sponsor, and the Department, may rely on, and neither may challenge, the Final Determination on Covered Events in any future Certification of Covered Costs related to the covered event that was the subject of that Initial Determination.

(b) The parties agree that no appeal shall be taken or further review sought, and that the Final Determination on Covered Events is final, conclusive, non-appealable and may not be set aside, except for fraud.