49 C.F.R. § 89.13 Documentary evidence of compromise.
Title 49 - Transportation
A compromise of any claim is not final or binding on the United States unless it is in writing, signed by an officer or employee authorized to compromise that claim.
Title 49: Transportation
PART 89—IMPLEMENTATION OF THE FEDERAL CLAIMS COLLECTION ACT
Subpart A—General
§ 89.13 Documentary evidence of compromise.