The three Institutions reiterate the role and responsibility of national Parliaments as laid down in the Treaties, in Protocol No 1 on the role of National Parliaments in the European Union annexed to the Treaty on European Union, to the Treaty on the Functioning of the European Union and to the Treaty establishing the European Atomic Energy Community and in Protocol No 2 on the application of the principles of subsidiarity and proportionality, annexed to the Treaty on European Union and to the Treaty on the Functioning of the European Union.
Athdhearbhaíonn na trí Institiúid ról agus freagracht na bParlaimintí náisiúnta de réir mar a leagtar síos sna Conarthaí, i bPrótacal Uimh. 1 maidir le ról na bParlaimintí Náisiúnta san Aontas Eorpach atá i gceangal leis an gConradh ar an Aontas Eorpach, leis an gConradh ar Fheidhmiú an Aontais Eorpaigh agus leis an gConradh ag bunú an Chomhphobail Eorpaigh do Fhuinneamh Adamhach agus i bPrótacal Uimh. 2 maidir le cur i bhfeidhm phrionsabail na coimhdeachta agus na comhréireachta, atá i gceangal leis an gConradh ar an Aontas Eorpach agus leis an gConradh ar Fheidhmiú an Aontais Eorpaigh.