On 18-19 June 2009, the Heads of State or Government of the 27 Member States of the European Union, meeting within the European Council, adopted a Decision on the concerns of the Irish people on the Treaty of Lisbon and declared that, at the time of the conclusion of the next accession Treaty, they would set out the provisions of that Decision in a protocol to be annexed, in accordance with their respective constitutional requirements, to the Treaty on European Union (TEU) and the Treaty on the Functioning of the European Union (TFEU).
An 18-19 Meitheamh 2009, rinne Ceannairí Stáit nó Rialtais 27 mBallstát an Aontais Eorpaigh, ag teacht le chéile dóibh i dtionól na Comhairle Eorpaí, Cinneadh a ghlacadh maidir leis an imní atá ar mhuintir na hÉireann i dtaca le Conradh Liospóin agus dhearbhaigh siad, tráth a dtabharfar an chéad Chonradh aontachais eile i gcrích, go leagfaidís amach forálacha an Chinnidh sin i bprótacal a chuirfear i gceangal, i gcomhréir lena rialacha bunreachtúla faoi seach, leis an gConradh ar an Aontas Eorpach (CAE) agus leis an gConradh ar Fheidhmiú an Aontais Eorpaigh (CFAE).