6.In cases where the countervailing duty has been subtracted from the anti-dumping duty for certain exporting producers, refund requests under Article 21 of Regulation (EU) 2016/1037 of the European Parliament and of the Councilnote shall also trigger the assessment of the dumping margin for that exporting producer prevailing during the refund investigation period. The amount to be reimbursed to the applicant for refund cannot exceed the difference between the duty collected and the combined countervailing and anti-dumping duty established in the refund investigation.