The European Union (Notification of Withdrawal) Act 2017 is in force. Royal Assent was given on 16th March. The legislative journey began on 26th January, after the Supreme Court’s judgment in the Miller case.
The Act gives the Prime Minister the power to notify the European Council of the United Kingdom's intention to withdraw from the EU. This will commence the 2 year period referred to in Article 50 of the Treaty on European Union. During that time, negotiations will take place with a view to concluding an agreement with the UK, setting out the arrangements for withdrawal, taking account of the framework for the UK's future relationship with the Union. Article 50 requires the negotiations to be conducted "in the light of the guidelines provided by the European Council." At present, no such guidelines have been published. The 2 year period can be extended as provided by Article 50.
The Bill's progress through Parliament was interesting but, alhough the House of Lords passed two amendments - (see the Bill with the amendments in place) - those amendments were removed after the Bill returned to the House of Commons. The Act is therefore enabling legislation to comply with the majority view in the Supreme Court that legislation was required for the notification.
The Act permits the giving of notice of withdrawal. The logically prior question of whether a decision to leave the EU has actually been taken does not appear on the face of the Act. Article 50(1) requires that the State intending to leave makes a decision in accordance with its constitutional requirements and notification of the decision then follows - Article 50(2). The Miller litigation and also the Parliamentary proceedings focused primarily on the notification. Whether this will have any legal impact is debatable and it may be arguable that the Act necessarily implies that a decision to leave has been taken. Why else would Parliament permit the giving of notice?
For ease of reference, Article 50 is set out below with some links added.
For a more detailed look at the Article 50 process see University of Sussex - Triggering Article 50 TEU - a legal analysis.
2. A Member State which decides to withdraw shall notify the European Council of its intention. In the light of the guidelines provided by the European Council, the Union shall negotiate and conclude an agreement with that State, setting out the arrangements for its withdrawal, taking account of the framework for its future relationship with the Union. That agreement shall be negotiated in accordance with Article 218(3) of the Treaty on the Functioning of the European Union. It shall be concluded on behalf of the Union by the Council, acting by a qualified majority, after obtaining the consent of the European Parliament.
3. The Treaties shall cease to apply to the State in question from the date of entry into force of the withdrawal agreement or, failing that, two years after the notification referred to in paragraph 2, unless the European Council, in agreement with the Member State concerned, unanimously decides to extend this period.
4. For the purposes of paragraphs 2 and 3, the member of the European Council or of the Council representing the withdrawing Member State shall not participate in the discussions of the European Council or Council or in decisions concerning it.
A qualified majority shall be defined in accordance with Article 238(3)(b) of the Treaty on the Functioning of the European Union.
5. If a State which has withdrawn from the Union asks to rejoin, its request shall be subject to the procedure referred to in Article 49.