I rise to speak to amendment 47, which stands in my name. It is a great privilege to follow the right hon. and learned Member for Beaconsfield (Mr Grieve), who has shown great resolution, fortitude and reason in the face of unreasonable criticism. We admire him for it. We are debating the single most important question in the Bill: how the House can exercise its view on the withdrawal agreement in a way that gives us control. “Controlâ€-there is a word we have heard before. It resonated throughout the referendum campaign, but when Members start to argue that Parliament should have some control over this process, it seems to send shivers down Ministers' spines. Amendment 47 arises from an exchange that I had with the Secretary of State on Second Reading. When I asked him to give us a very simple assurance that clause 9 will not be used to implement the withdrawal agreement until Parliament has had the opportunity to vote on it, he replied:“It seems to me to be logicalâ€.- What has been set out in today's written ministerial statement appears to give that undertaking, but if that is what Ministers are prepared to do, why not put that into the Bill? I similarly welcome the Secretary of State's announcement that there will be separate legislation to implement the withdrawal agreement, but if Ministers are prepared to give that commitment, we want to see that in the Bill, too, which is why I shall vote for amendment 7. The question has been asked-I want to ask it, too, because it has exercised the Select Committee-“What is clause 9 now for?â€ It is a very simple question indeed. Timing and the order in which these things are done are absolutely crucial in this debate, and that point was made forensically and forcefully by the right hon. and learned Member for Beaconsfield. May I suggest a new principle? We often heard it said during reports back from the negotiations that nothing is agreed until everything is agreed, so I suggest that we agree that nothing should be implemented until everything is agreed. The written ministerial statement says something interesting, and rather puzzling:“The Bill will implement the terms of the Withdrawal Agreement in UK law...Similarly, we expect any steps taken through secondary legislation to implement any part of the Withdrawal Agreement will only be operational from the moment of exit, though preparatory provisions may be necessary in certain cases.â€My simple question for Ministers is this: secondary legislation where, and arising from what? Does this refer to clause 9, which a lot of Members think should no longer be in the Bill, or is it advance notification that there will be provision for secondary legislation under the withdrawal agreement and implementation Bill that we have been promised? We need some clarification. My hon. Friend the Member for Greenwich and Woolwich (Matthew Pennycook), who spoke so ably from the Front Bench, drew attention to the statement by the Secretary of State on 13 November in which he said, in announcing that Bill:“This confirms that the major policies set out in the withdrawal agreement will be directly implemented into UK law by primary legislationâ€.- That is very interesting. I must confess that I did not understand the full significance at the time, so will Ministers also enlighten us on this? What are the major policies and what are the minor policies, and in which Bill, and by what means, will those minor policies be implemented? The next issue of timing is the idea that exit day should be set as 11 o'clock in the evening of 29 March 2019. The Government amendment to implement that proposal would cause all sorts of trouble, not least because of the way that this Bill was originally drafted, as the Select Committee heard in evidence from Ministers, who confirmed that they would be able to set different exit days for different purposes. The Committee thought that that seemed to provide a great deal of flexibility, but the amendment would bring that possibility to an end, and in the process bind the Government's hands to an hour of the clock on a day at the very moment when they may well need maximum flexibility so that they can bring the negotiations successfully to an end. The amendment really makes no sense. As the Committee said in its report, the proposal would cause “significant difficultiesâ€ if the negotiations went down to the wire. Of course, we had the famous evidence from the Secretary of State in which he suggested that the negotiations might go to the 59th minute of the 11th hour, although since then there has been a certain amount of rowing back, because that would not be consistent with the pledge that we have been given. That was why the Committee said that it would not be acceptable for Parliament to be asked to vote after we had actually left the European Union. The timing of all this is absolutely fundamental to making the vote meaningful. A vote may be meaningless unless at some point in the procedure the timing ensures that it is meaningful. We have to get the order right. Michel Barnier said at the start of the process that he wanted to bring the negotiations to an end next October. We have 11 months to go to deal with a very long list of issues that we have not even started to broach. The agreement that was reached last week, which we welcome, is the easy bit of this negotiation-the really difficult bit is about to begin. Those who had thought that leaving the European Union would be about keeping all the things they liked and getting rid of all the things they did not like are now in for a rude awakening as they come to realise that choices have consequences and trade-offs will need to be made.