Judgment_paragraph 15 · Fazenda Pública - Director Geral das Alfândegas v ZF Zefeser - Importação e Exportação de Produtos Alimentares Lda (C-62/06)

15Such is the case, in particular, where the problem referred to the Court is purely hypothetical (see, to that effect, inter alia, Case C-379/98 PreussenElektra [2001] ECR I-2099, paragraph 39; Case C-390/99 Canal Satélite Digital [2002] ECR I-607, paragraph 19; and Case C-380/01 Schneider [2004] ECR I-1389, paragraph 22). The spirit of cooperation which must prevail in the preliminary ruling procedure requires the national court to have regard to the function entrusted to the Court of Justice, which is to assist in the administration of justice in the Member States and not to deliver advisory opinions on general or hypothetical questions (Schneider, paragraph 23, and Case C-165/03 Längst [2005] ECR I-5637, paragraph 33).