19 C.F.R. § 182.52

If a claim for a refund of duties is allowed by the Canadian or Mexican customs administration under Article 5.11 of the USMCA (post-importation claim) or under any other circumstance after drawback has been granted under this subpart, the appropriate CBP official must reliquidate the drawback claim and obtain a refund of the amount paid in drawback in excess of the amount permitted to be paid under § 182.44.