Judgments at the European Court of Justice are to investigate whether the UK can lose its & # 39; process to leave EU without permission from member states.
The EU leaves the EU on 29 March under the terms of "Article 50", which was promoted by MP in last year's March.
A group of Scottish politicians have filed a court challenge to find out if this can be devolved individually.
The United Kingdom government opposes the case, but did not stop doing it; going ahead of the judges in Luxembourg.
Management expectations are not currently Tuesday.
The case is being heard against the backing of a # 39; Prime Minister Theresa May fought to sell her draft Commitment to MPs, ahead of a vote in the Commons in December.
Those who were pushed on the # 39; case that he would give an additional option to MP when they considered whether they should approve the draft cover or not, because of them; and he could not do it; Watching all the bugs on the board.
A case was first raised in the names of a cross party group of Scottish politics, including Green MSPs Andy Wightman and Ross Greer, MEP Alyn Smith and MP Joanna Cherry from SNP, and the Labor Members David Martin and Catherine Stihler.
They want their court to go to; Regarding at least the UK's Article 50 could be defensively unavoidable, and they were allowed to bring their case to Luxembourg by the Court of the Session of Scotland.
Mr Wightman said he was looking forward to the hearing, saying: "The question of whether a BP can cause Section 50 alone is essential, A dispute around Brexit shows that any mark has been resolved.
"The United Kingdom parliament needs to be fully aware of its options."
Case & Purple & # 39;
Ms Cherry raised her case and her. The case of Artagal 50 was brought back by Mrs May in the Commons on Monday, asking her to go to her. prime minister to say "he is not going to happen because he is not a government policy."
The government of the United Kingdom has been fighting against its & # 39; case at each time, arguing in the main Scottish and UK courts that should not be sent to European judges.
The UK government's position is that "a court has been rejected for very good reasons" not to answering magnificent questions, and as ministers do not expect Article 50 to be discontinued, there is a question whether they are or are not attractive.
He has also argued that the questions are being submitted to the court "for political debate reasons", and "they are designed to influence the terms of debate still in parliament" .