10 CFR §950.37

1. (a)If the parties reach a Final Agreement on a contract matter in dispute through mediation, or a Final Decision on a contract matter in dispute through a Summary Binding Decision as set forth in this subpart, the Final Agreement or Final Decision is a final settlement of the contract matter in dispute, made by the sponsor and the Program Administrator.
2. (b)The parties agree that no appeal shall be taken or further review sought, and that the Final Agreement or Final Decision is final, conclusive, non-appealable and may not be set aside, except for fraud.