With reference to Article 2(2) of the Treaty on the Functioning of the European Union on shared competence, when the Union has taken action in a certain area, the scope of this exercise of competence only covers those elements governed by the Union act in question and therefore does not cover the whole area.
Maidir le hAirteagal 2(2) den Chonradh ar Fheidhmiú an Aontais Eorpaigh a bhaineann le hinniúlachtaí roinnte, i gcás ina nglacfaidh an tAontas beart i réimse áirithe, ní chumhdóidh raon feidhme fheidhmiú na hinniúlachta sin ach na gnéithe a rialaítear leis an ngníomh sin de chuid an Aontais atá i gceist agus ní chumhdóidh sé dá bhrí sin an réimse go léir.