Amendments 1 and 2, the latter of which amends clause 26, relate to the commencement and operationalisation of the provisions in the Bill. I have drafted them in this way because of the nature of the Bill itself. We will come to amendment 2 on day three, but amendment 1 paves the way for it, so it may be convenient if I set out the thinking behind both amendments.
As was debated at some length on Second Reading—I will not repeat everything that was said—this is an unusual and rather exceptional Bill, and not necessarily in a good way. If fully brought into effect, the Bill would lead to the United Kingdom departing unilaterally from an international agreement and therefore breaking its obligations under both customary international law and the Vienna convention on the law of treaties, which is a grave and profound step for any Government to take.
I recognise that there are circumstances in which that step can be taken, and the Government asserted on Second Reading that the operation of the Northern Ireland protocol gives rise, or potentially gives rise, to those circumstances. The essence of it, though, depends on applying a factual evidence base to a legal test. The legal test in this case is essentially the international customary law convention of necessity, which is now enshrined in article 25 of the articles on state responsibility, which were adopted by the International Law Commission in 2001 and are recognised by the UN General Assembly, by our Government and by the international community as an authoritative statement of the law. Article 25 sets out that necessity may be invoked if certain tests are met. The point of these amendments is to say that if the Government, or any Government, were to take that step, they should do so upon the most compelling grounds, so that the factual basis for their actions met the legal test. The reputational consequences, politically, internationally and legally, are very significant, so this should be done only when that is thoroughly tested and set before this House to be tested.