++++ 1.Action for annulment - Time-limit - When time begins to run - Decision notified to the applicant by the national authorities - Precise knowledge of the decision' s contents ( EEC Treaty, Art . 173, third paragraph ) 2.European Communities' own resources - Post-clearance recovery of import or export duties - Importer complying with the conditions set out in Article 5(2 ) of Regulation No 1697/79 - Post-clearance recovery - Barred ( Council Regulation No 1697/79, Art . 5(2 ) ) 3.Customs union - Harmonization of laws - Procedures for the release of goods into free circulation - Obligations of the person making the customs declaration ( Council Directive 79/695, Art . 3(1 ); Commission Directive 82/57, Art . 2 )