Union Customs Code — Article 86

l, at the request of the declarant, be determined on the basis of the tariff classification, customs value, quantity, nature and origin of the goods placed under the inward processing procedure at the time of acceptance of the customs declaration relating to those goods. under the inward processing procedure at the time of acceptance of the customs declaration relating to those goods. 4. In specific cases, the amount of import duty shall be determined in accordance with paragraphs 2 and 3 of this Article without a request of the declarant in order to avoid the circumvention of tariff measures referred to in point (h) of Article 56(2). 5. Where a customs debt is incurred for processed products resulting from the outward processing procedure or replacement products as referred to in Article 261(1), the amount of import duty shall be calculated on the basis of the cost of the processing operation undertaken outside the customs territory of the Union. calculated on the basis of the cost of the processing operation undertaken outside the customs territory of the Union. 6. Where the customs legislation provides for a favourable tariff treatment of goods, or for relief or total or partial exemption from import or export duty pursuant to points (d) to (g) of Article 56(2), Articles 203, 204, 205 and 208 or Articles 259 to 262 of this Regulation or pursuant to Council Regulation (EC) No 1186/2009 of 16 November 2009 setting up a Community system of reliefs from customs duty such favourable tariff treatment, relief or exemption shall also apply in cases where a customs debt is incurred pursuant to Articles 79 or 82 of this Regulation, on condition that the failure which led to the incurrence of a customs debt did not constitute an attempt at deception.