A High Court Judge in Belfast has dismissed the UK's first legal challenge to Brexit.
Mr Justice Paul Maguire said the implications for Northern Ireland were still uncertain after Prime Minister Theresa May said she would begin exit negotiations with Europe before March.
A cross-party group of politicians had claimed the country should have a veto on an exit and said the Stormont Assembly should have a say on whether to trigger negotiations with Europe.
Raymond McCord, whose son was murdered by loyalist paramilitaries, had a separate Brexit challenge surrounding its impact on the peace process heard alongside that of the politicians at the High Court in Belfast.
Mr Justice Maguire said: "While the wind of change may be about to blow, the precise direction in which it will blow cannot yet be determined so there is a level of uncertainty, as evidenced by the discussion about how the Northern Ireland land border with Ireland was affected by withdrawal from the EU."
He added: "In respect of all issues, the court dismissed the applications."
A Downing Street spokesman welcomed the court's judgment.
"It agrees that we can proceed to trigger Article 50 as planned," he said.
"But I think what's important to stress, one of the concerns that was raised during this court case is that there is no reason to think that the outcome of the referendum will do anything to undermine the rock-solid commitment that the Government has to the settlement that was set out in the Belfast Agreement and to the people of Northern Ireland."
Deputy First Minister Martin McGuinness says he has “no faith” that Parliament would vote to reject the Brexit process being triggered.
The Northern Ireland peace process is based upon membership of the European Union, the High Court has heard.
Ulster Unionist leader Mike Nesbitt warns Northern Ireland faces a 'decade of uncertainty' following the UK's decision to leave the EU.