Since the objectives of this Directive cannot be sufficiently achieved by the Member States in view of the international nature of the Union equity market and action by Member States alone is likely to result in different sets of rules, which may undermine or create new obstacles to the functioning of the internal market, but can rather, by reason of their scale and effects, be better achieved at Union level, the Union may adopt measures, in accordance with the principle of subsidiarity as set out in Article 5 of the Treaty on European Union.
Ós rud é nach féidir leis na Ballstáit cuspóirí na Treorach seo a ghnóthú go leordhóthanach, i bhfianaise nádúr idirnáisiúnta mhargadh cothromais an Aontais agus gur dócha gur sraitheanna éagsúla rialacha a leanfaidh gníomhaíocht ó na Ballstáit ina n-aonar, rud a fhéadfaidh an bonn a bhaint d’fheidhmiú an mhargaidh inmheánaigh nó constaicí nua a chruthú dó, ach, de bharr a scála agus a n-éifeachtaí, gur fearr is féidir na cuspóirí a ghnóthú ar leibhéal an Aontais, féadfaidh an tAontas bearta a ghlacadh, i gcomhréir le prionsabal na coimhdeachta a leagtar amach in Airteagal 5 den Chonradh ar an Aontas Eorpach.