Article 4(3) of the Treaty on European Union (TEU) recalls the principle of sincere cooperation by virtue of which the Union and the Member States are, in full mutual respect, to assist each other in carrying out tasks which flow from the TEU and the TFEU.
Le hAirteagal 4(3) den Chonradh an Aontais Eorpaigh (CAE), meabhraítear prionsabal an chomhair dhílis lena ndéanfaidh an tAontas agus na Ballstáit, agus lánurraim fhrithpháirteach á tabhairt acu dá chéile, cúnamh a thabhairt dá chéile chun cúraimí a chineann ó CAE agus CFAE.