As part of the agreement, the British Parliament repealed the Government of Ireland Act 1920 (which had founded Northern Ireland, divided Ireland and asserted territorial right to the whole of Ireland) and the people of the Republic of Ireland amended Articles 2 and 3 of the Irish Constitution, which asserted a territorial right to Northern Ireland. Political unionism should adopt this narrative and make it clear to the various European and American interest groups who claim their support for the Good Friday Agreement that if the agreement does not allow for a tangible border in Ireland, it is certainly not possible to create a new border within the United Kingdom. The agreement was approved by voters across the island of Ireland in two referendums on 22 May 1998. In Northern Ireland, in the 1998 referendum on the Good Friday Agreement in Northern Ireland, voters were asked if they supported the multi-party agreement. In the Republic of Ireland, voters were asked whether they would allow the state to sign the agreement and authorize the necessary constitutional changes (nineteen constitutional amendments from Ireland) to facilitate it. The citizens of both countries had to approve the agreement to implement it. US leaders have warned Britain against its obligations under the withdrawal agreement signed with the European Union and warned that the Belfast agreement must be protected. This conference takes the form of regular and frequent meetings between The British and Irish ministers to promote cooperation between the two governments at all levels. On issues not left to Northern Ireland, the Irish government can present views and proposals. All decisions of the Conference are taken by mutual agreement between the two governments and the two governments, in order to make resolute efforts to resolve the differences between them. In 2004, negotiations were held between the two governments, the DUP, and Sinn Féin, for an agreement to restore the institutions.
The talks failed, but a document published by governments detailing the changes to the Belfast agreement was known as the “comprehensive agreement.” However, on 26 September 2005, it was announced that the Provisional Republican Army of Ireland had completely closed its arsenal of weapons and had “taken it out of service”.