19 CFR 173.1 : Customs Duties (§ 0.1 To Parts 400-599) — (§ 141.0 To Parts 193-199) — U.S. Customs And Border Protection, Department Of Homeland Security; Department Of The Treasury (Continued) (§ 141.0 To Parts 193-199) — Administrative Review In General (§ 173.0 To § 173.5) — Authority to review for error.

Port directors have broad responsibility and authority to review transactions to ensure that the rate and amount of duty assessed on imported merchandise is correct and that the transaction is otherwise in accordance with the law. This authority extends to errors in the construction of a law and to errors adverse to the Government as well as the importer.