94In that context, it must be emphasised that, in proceedings before the national courts, individual parties have the right to challenge before the courts the legality of any decision or other national measure relative to the application to them of a European Union act of general application, by pleading the invalidity of such an act (see, to that effect, Unión de Pequeños Agricultores v Council, paragraph 42, and E and F, paragraph 45).
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