++++ 1 . Own resources of the European Communities - Post-clearance recovery of import or export duties - Customs administration error resulting in the use, for calculation of duties, of a rate indicated purely for guidance in a national customs tariff manual, which was incorrect - Error capable of detection by the trader concerned ( Council Regulation No 1697/79, Art . 5(2 ) ) 2 . Own resources of the European Communities - Post-clearance recovery of import or export duties - Error deriving from "information" given by the competent authorities themselves - Definition ( Council Regulation No 1697/79, Art . 5(1 ) )