It is a pleasure, once again, to serve under your chairmanship, Dame Rosie, just as it is to follow the right hon. and learned Member for Rushcliffe (Mr Clarke), the Father of the House, who gave an informed and powerful speech that we would do well to take on board as we proceed in today's debate. I rise to speak to new clause 66 and amendments 30, 27 and 29, which stand in my name and those of my right hon. and hon. Friends. I also intend to speak to amendment 28 and to the wider question of whether clause 9 should stand part of the Bill. In its policy impact, clause 9 is arguably the most important in the Bill and, taken together, clauses 9 and 17 give rise to a very wide range of interlocking issues. For the purposes of clarity, I intend to speak first to amendments 30, 27 and 28, which relate to the purpose, scope and limits of clause 9 and whether it should stand part of the Bill. I will then turn to amendment 29, which relates to the purpose, scope and limits of clause 17. I will finish by dealing with new clause 66 and the thorny issue of Parliament's role in approving the final terms of the UK's exit from the EU and any associated transitional arrangements that might be agreed. I turn first to the purpose, scope and limits of clause 9. The Government have argued that the clause 9 power is necessary in order that they have sufficient flexibility to give effect to whatever is in the withdrawal agreement and to ensure that there are no holes in the statute book after exit day. The withdrawal agreement, it should be noted, is defined in clause 14 as an agreement, whether or not ratified, agreed with the EU under article 50, meaning that the powers in clause 9 could be used before a withdrawal agreement is ratified but not, as the clause makes clear, after exit day for the purposes of the Bill, because the power will expire at that point. In the light of the Secretary of State's announcement on 13 November that the Government intend to bring forward a withdrawal agreement and implementation Bill in order to give the agreement and any agreed transitional arrangements domestic legal effect, an announcement, it should be noted, that was confirmed in writing in the joint UK-EU report published last Friday, it is entirely unclear why the Government still require the powers provided for by clause 9. Let me set out why we believe that to be the case. In that announcement on 13 November, the Secretary of State made it clear that the major policies set out in the withdrawal agreement, including those reached last week on citizens' rights, Northern Ireland and the financial settlement, along with any agreement on transitional arrangements, would be implemented by means of the withdrawal agreement and implementation Bill and not by secondary legislation provided for by the Bill before us. So barring some unforeseen delay in the concluding of a withdrawal agreement, if the Government are not to create significant legal uncertainty following our departure with regard to the major policies covered by such an agreement, the withdrawal agreement and implementation Bill will have to have come into force by 29 March 2019 at the latest. My hon. Friend the Member for Streatham (Chuka Umunna) covered that point. In legal terms, any transitional arrangements agreed to could not bridge a post-exit gap, because even if some elements of the withdrawal agreement come into effect at the end of any such period, an agreement on transition itself will have had to have been given legal effect in the UK by means of the very same primary legislation, namely the withdrawal agreement and implementation Bill. As such, unless the Government are proposing to begin the process of implementing the withdrawal agreement and any agreed transitional arrangements immediately after the final terms of such an agreement are reached, but pre-ratification, by means of secondary legislation in this Bill-a point made earlier by the right hon. and learned Member for North East Hertfordshire (Sir Oliver Heald), who is not in his place-a course of action for which there is no justification, given that the phase 1 joint report published last week sets out in black and white the intention to provide a specified period to approve the agreement and transitional arrangements in accordance with our own constitutional procedures and to prepare the statute book in accordance with that agreement, there is simply no need for the powers provided for by clause 9, including the broad power under that clause to amend the Bill itself.