The agreement was reached between the British and Irish governments as well as eight northern Ireland political parties or groups. Three were representative of unionism: the Ulster Unionist Party, which had led unionism in Ulster since the early 20th century, and two small parties linked to loyalist paramilitaries, the Progressive Unionist Party (linked to the Ulster Volunteer Force (UVF) and the Ulster Democratic Party (the political wing of the Ulster Defence Association (UDA). Two of them have been widely described as nationalists: the Social Democratic and Labour Party and Sinn Féin, the Republican party affiliated with the Provisional Republican Army.   Apart from these rival traditions, there were two other assemblies, the Inter-Community Alliance Party and the Northern Ireland Women`s Coalition. There was also the Labour coalition. U.S. Senator George J. Mitchell was sent by U.S. President Bill Clinton to chair the talks between parties and groups.
 The British government, through the Northern Ireland Act 1998, enshrined the principle of self-determination in legislation and also repealed the Government of Ireland Act 1920, which initially divided the island of Ireland. The Northern Ireland minister will call a referendum on a united Ireland if it is likely that a majority of the population would vote in favour of a united Ireland. If the referendum is rejected, it will take at least seven years before a new referendum can be held. 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. 3. As a result, all participants reaffirmed their commitment to the complete disarmament of all paramilitary organizations. They also reaffirm their intention to continue to cooperate constructively and in good faith with the Independent Commission and to use their influence to secure the dismantling of all paramilitary weapons within two years of the approval of the Agreement, in the north and south, and as part of the implementation of the comprehensive regime. On August 17, 2001, Secretary of State John Reid issued a 75-reference police plan to implement the Patten Commission`s recommendations. The plan contains detailed progress in the areas of demline, the appointment of a supervisory commissioner, the size of the police and the selection of new recruits at 50:50.
A new police committee was set up in September. On 4 November 2001, Royal Ulster Constabulary changed its name to the Police Service of Northern Ireland. On December 12, the police also modified a plaque for the new service and the emblem.1″Commission on Policing for Northern Ireland”, called on January 29, 2013, www.bbc.co.uk/northernireland/schools/agreement/policing/commissi… The Protocol on Ireland and Northern Ireland, which is included in the UK`s withdrawal agreement from the EU, confirmed that the Good Friday Agreement must be protected in all its parts.