Since the Good Friday Agreement links the British government to several legal issues in Northern Ireland, it is a de facto part of the United Kingdom Constitution. The right commentator David Allen Green described it as “a central constitutional text of the United Kingdom and Ireland […] of more everyday importance than sacred instruments such as, say, Magna Carta of 1215 or the Bill of Rights of 1689.”  The agreement was for Northern Ireland to be part of the United Kingdom and remain in place until a majority of the population of Northern Ireland and the Republic of Ireland wished otherwise. If this happens, the British and Irish governments will be “obliged” to implement this decision. The two main political parties in the agreement were the Ulster Unionist Party (UUP), led by David Trimble, and the Social Democratic and Labour Party (SDLP), led by John Hume. The two heads of state and government together won the Nobel Peace Prize in 1998. The other parties to the agreement were Sinn Féin, the Alliance Party and the Progressive Unionist Party. The Democratic Unionist Party (DUP), which later became the largest Unionist party, did not support the agreement. When Sinn Féin and loyalist parties entered, they left the talks because republican and loyalist paramilitary weapons had not been decommissioned. The Belfast Agreement is also known as the Good Friday Agreement, as it was concluded on Good Friday on 10 April 1998. It was an agreement between the British and Irish governments and most of northern Ireland`s political parties on how to govern Northern Ireland. Discussions that led to the agreement have focused on issues that have led to conflict in recent decades.
The aim was to form a new de-defyed government for Northern Ireland, where unionists and nationalists would share power. The agreement consists of two related documents, both agreed on Good Friday, 10 April 1998 in Belfast: the pioneering agreement, also known as the Belfast Agreement, was signed on 10 April 1998 between the then British and Irish Prime Ministers, Tony Blair and Bertie Ahern. The agreement provided for a 108-member elected assembly in Belfast responsible for finance, economic development, health, education, welfare, environment and agriculture. Other tasks would remain in London. 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.