Many of the activities in the customs area are of a cross-border nature, involving and affecting all Member States, and therefore they cannot be effectively and efficiently delivered by individual Member States.
Is de chineál trasteorann go leor de na gníomhaíochtaí i réimse an chustaim, gníomhaíochtaí a bhaineann leis na Ballstáit uile agus a dhéanann difear dóibh uile agus, dá bhrí sin, ní féidir le Ballstáit aonair iad a bhaint amach go héifeachtach ná go héifeachtúil.