I fully acknowledge that that is most certainly a circumstance that could arise. Of course, one might address that circumstance by Parliament legislating to reflect the outcome of that post-Brexit decision. However, I fully acknowledge that, depending on the way in which one constructs the departure on exit day, one might find that what one has retained as EU law ceases to be EU law almost immediately after one has left the EU. I believe that that has been acknowledged on a number of occasions. Indeed, it could lead to the development of two parallel jurisprudences—one for retained EU law and one for EU law. That is an inevitable outcome of our decision to leave the EU but to retain in our domestic law that which was EU law at the point of our departure. I fully acknowledge that, but it might also be a circumstance in which potentially one would seek to exercise the exceptional regulatory power that is referred to.
Reference was made to Amendments 41 and 42, tabled by the noble and learned Lord, Lord Goldsmith, and the noble Lord, Lord Foulkes, which seek to retain indefinitely in domestic law rights of challenge based on the general principles of EU law. If agreed to, these amendments would empower domestic courts to quash administrative actions or secondary legislation or, indeed, even go as far as disapplying an Act of Parliament on the ground that it breaches one or more of the retained general principles of EU law—that could take place long after we have left the EU. That is why we have to have
a point in time at which we have certainty as to the scope for such challenges, and that is reflected in the schedule.
As the noble and learned Lord, Lord Goldsmith, acknowledged, Amendment 41 would go even further. It seeks to set out an ostensibly broader definition of which general principles are to be retained under the Bill. In that context, he alluded to Article 191 of the TFEU, which deals with environmental issues. I take issue with him as to whether the polluter pays principle and the precautionary principle are both now accepted as general principles of EU law. I would suggest that there is considerable doubt as to whether the former, in particular, constitutes what is recognised in EU law as a general principle, so I have some difficulty with that amendment.
I come now to Amendment 63, also tabled by the noble Baroness, Lady Bowles. It is, I apprehend, intended to retain this right of challenge but solely for the principle of proportionality, as she indicated, and specifically including where retained EU law is to be treated as primary legislation. It would also appear to permit the possibility of a challenge on the basis of invalidity of EU law, as well as judicial review of such legislation. It is our position that the general principles of EU law, such as proportionality, non-retroactivity and fundamental rights, will be kept in our domestic law, but in order to assist in interpreting retained EU law and not to give rise to additional stand-alone rights. Whereas some general principles are now set out expressly in EU treaties, the general principles were those that were first recognised by the European Court of Justice. They are essentially judge-made and determined as principles on the basis of case law. It is those principles that we are dealing with.
I come back for a moment to Amendment 41, which goes beyond just the issue of proportionality. It would undermine the approach that we are seeking to take if we were to pursue it. In particular the inclusion of Article 191 in the amendment risks going further than the existing principles that are, as I say, set out in EU law and consequently in UK law today.