An inconvenient point
for Best for Britain is that the European Union (Withdrawal) Bill contains provisions to repeal the European Union Act 2011. First, there is Clause 17. Secondly, there is Schedule 9. Those must be considered in the light of Clause 19. All of this is rather dull, legalistic, material but here goes:
Clause 17 is headed "Consequential and Transitional Provision" and Clause 17(7) gives effect to Schedule 9 which will repeal various Acts including the European Union Act 2011. Clause 19 deals with Commencement. Only certain sections will come into force on the day the Act is passed - see 19(1). Clause 19(2) states - "The remaining provisions of this Act come into force on such day as a Minister of the Crown may by regulations appoint; and different days may be appointed for different purposes."
So, once the Bill receives Royal Assent, the Minister can make a regulation - by way of Clause 19(2) - bringing Schedule 9 at least partially into force so that any part of the 2011 Act requiring a referendum no longer applies.
The Withdrawal Bill is now undergoing its committee stage in the House of Lords and it is open to them to amend the Bill so as to protect the 2011 Act. Whether this will happen remains to be seen.
As things stand, the 2011 Act "referendum lock" need not be an obstacle to a government determined to secure Brexit.
My view on this almost a year ago is HERE.
Discussion re the 2011 Act - UK Constitutional Law Group blog
A further challenge by "Crowdjustice" is currently before the High Court - see HERE. This challenge argues that Parliament has never delegated the withdrawal decision to the people and has never made the withdrawal decision itself. Consequently, the Article 50 notification is predicated on a decision that has no basis in law. Judicial review has to be brought within strict time limits and the court's permission is required. In February, on the basis of the papers filed, the court refused permission but there is to be an oral permission hearing.
Some points / thoughts:
The European Union (Referendum) Act 2015 - Parliament could have made it clear in the Act that the referendum outcome was to be legally binding. It did not do so.
Article 50(1) TEU- "Any Member State may decide to withdraw from the Union in accordance with its own constitutional requirements." What those requirements are is a matter for domestic law and not EU law.
The UK's unwritten / informal constitutional arrangements do not dictate any specific way by which important decisions are to be made. In practice, the government of the day determines its policy and will then seek any necessary legislation to give effect to that policy. Whilst Article 50 refers to a "decision" it is essential to recognise that Brexit can be achieved via this usual process. Following the 2016 referendum, the government determined that Brexit had to be implemented and it will be implemented provided they can secure the necessary legislation. Parliament is in the process of doing this - e.g. the European Union (Withdrawal) Bill.
For those seeking some form of "decision" it is possible to glean a form of decision from events - the referendum result, the subsequent debates in Parliament demonstrating political acceptance of the referendum (e.g. debate 27th June 2016, resolution of 12th October 2016 and the Motion of the House of Commons of 7 December 2016*) and the enactment of the European Union (Notification of Withdrawal) Act 2017.
Parliament - as the UK's sovereign body - could make a formal decision to leave the EU and could expressly state that decision in legislation but it would appear that it is not necessary for it to do so.
* 7th December 2016
That this House recognises that leaving the EU is the defining issue facing the UK; notes the resolution on parliamentary scrutiny of the UK leaving the EU agreed by the House on 12 October 2016; recognises that it is Parliament’s responsibility to properly scrutinise the Government while respecting the decision of the British people to leave the European Union; … recognises that this House should respect the wishes of the United Kingdom as expressed in the referendum on 23 June; and further calls on the Government to invoke Article 50 by 31 March 2017.This motion was passed by 448 votes to 75.
Law and Lawyers 16th June 2017 - The (elusive) decision to leave the EU