The final withdrawal agreement between the EU and the UK has agreed on a complex solution to this delicate problem. Under the proposed regime, Northern Ireland, like the rest of the UK, would leave the EU customs union, the basis for common tariffs on all products imported into the bloc. However, the necessary customs checks would not take place at the border with the Republic of Ireland, but between Northern Ireland and Great Britain, creating a new border in the Irish Sea. Meanwhile, Northern Ireland – but not the rest of the UK – would continue to follow many of the EU`s internal market rules, so that the land border with Ireland could remain open. This regime is also supported by a separate agreement between Ireland and the United Kingdom allowing the free movement of persons between the two countries. Referendums were held on 22 May 1998 in both Northern Ireland and the Republic of Ireland. In Northern Ireland, people were asked: “Do you support the agreement reached in the multi-party negotiations on Northern Ireland and presented in Command Paper 3883?” The participation rate was 81.1 per cent, of which 71.1 per cent argued in favour of approval. In the Republic of Ireland, people were asked: “Do you support the proposed constitutional amendment contained in the stated bill, nineteenth Amendment of the Constitution Bill, 1998?” The turnout was 55.6%, of which 94.4% supported the proposed amendment to the Constitution.1 – encouraging the parties to agree that this commitment should be maintained by a new Assembly in order to take into account the wishes and sensitivities of the Community. The Democratic Unionist Party are trade unionists from Ulster, which means they support Northern Ireland, which remains part of the United Kingdom, and oppose a united Ireland.
The party is a defender of the British and Protestant cultures of Ulster against Irish nationalism and republicanism.   It supports the marching rights of the Loyalist Order of the Oraniers, which has many members of the DUP;  is also in favour of the British union flag being raised from government buildings throughout the year.