Direct domination of London ended in Northern Ireland when power was formally transferred to the new Northern Ireland Assembly, the North-South Council and the Anglo-Irish Council when the opening decisions of the Anglo-Irish Agreement came into force on 2 December 1999.    Article 4, paragraph 2 of the Anglo-Irish Agreement (the agreement between the British and Irish governments on the implementation of the Belfast Agreement) required both governments to inquire in writing about compliance with the terms of entry into force of the Anglo-Irish Agreement; The latter is expected to come into effect as soon as both notifications are received.  The British government has agreed to participate in a televised ceremony at Iveagh House in Dublin, the Irish Foreign Office. Peter Mandelson, Minister of Northern Ireland, participated in his participation in early December 2, 1999. He exchanged notifications with David Andrews, the Irish Foreign Secretary. Shortly after the ceremony, at 10:30 a.m., the Taoiseach, Bertie Ahern, signed the declaration of formal amendment of Articles 2 and 3 of the Irish Constitution. He then informed the D`il that the Anglo-Irish agreement had entered into force (including some endorsements to the Belfast Agreement).   As part of the agreement, the British and Irish governments committed to holding referendums in Northern Ireland and the Republic on 22 May 1998. The referendum on Northern Ireland is expected to approve the deal reached at the multi-party talks. The Republic of Ireland`s referendum should approve the Anglo-Irish agreement and facilitate the modification of the Irish constitution in accordance with the agreement. Shortly after her election in 1993, Clinton appointed Democratic Senator George Mitchell as the U.S. Special Envoy for Northern Ireland. It would give its name to the “Mitchell Principles” that led the negotiations and played a key role in securing an agreement.
Liam Kennedy explains. The agreement called for the creation of an independent commission to review police rules in Northern Ireland, “including ways to promote broad community support” for these agreements. The UK government has also pledged to carry out a “large-scale review” of the criminal justice system in Northern Ireland. The participants in the agreement were composed of two sovereign states (the United Kingdom and the Republic of Ireland), with armed forces and police forces involved in the riots. Two political parties, Sinn Féin and the Progressive Unionist Party (PUP), were linked to paramilitary organisations: the IRA (Commissional Irish Republican Army) and the Ulster Volunteer Force (UVF). The Ulster Democratic Party (UDP), associated with the Ulster Defence Association (UDA), had withdrawn from the talks three months earlier. 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.  On 9 January 2020, the British and Irish governments proposed to the political parties of the new decade and the new approach the “New Decade” agreement, which provides for a balanced package to make Northern Ireland`s policy and government more transparent, accountable, more stable, more inclusive and more effective.