De "Study on the single asylum procedure ‘one-stop shop’ against the background of the common European asylum system and the goal of a common asylum procedure " (Studie betreffende de “éénloketprocedure” tegen de achtergrond van het gemeenschappelijk Europees asielstelsel en de doelstelling van een gemeenschappelijke asielprocedure) (hierna: "de studie") is in januari 2003 uitgebracht en is in het Engels te vinden op het volgende webadres:
Since the objectives of this Regulation, namely, to lay down rules and procedures applicable to goods brought into or out of the customs territory of the Community in order to enable the Customs Union to function effectively as a central pillar of the internal market, cannot be sufficiently achieved by the Member States and can therefore be better achieved at Community level, the Community may adopt measures, in accordance with the principle of subsidiarity as set out in Article # of the TreatyEurLex-2 EurLex-2