Parts or components of a single article
Article 178
Where repayment or remission is subject to destruction, abandonment to the State or placement under a special procedure or the export procedure of goods, but the corresponding formalities are completed only for one or more parts or components of those goods, the amount to be repaid or remitted shall be the difference between the amount of import or export duty on the goods and the amount of import or export duty which would have been applicable on the remainder of the goods if they had been placed in an unaltered state under a customs procedure involving the incurrence of a customs debt, on the date on which the goods were so placed.