Once the bill completes its common phase, it will go to the Lords. In particular, the Lords will consider the broad delegated powers that the government intends to adopt in this legislation. It was a big battleground in the EU Withdrawal Act 2018. Limited control of WABs is, to some extent, the result of institutional design, not government decision-making. From the beginning of the Brexit process, it was foreseeable that the REVIEW of WABs would be deficient. There are two main reasons for this. First, the bill would not be introduced and advanced by Parliament until the withdrawal agreement has been concluded and politically agreed. This meant that Parliament`s margin for change was limited by the fact that the treaty was concluded, but more importantly, the political conditions of the debate would mean that there would be little appetite or little time for constructive consideration. Second, the absence of parliamentary procedures or constitutional provisions to structure parliamentarians` commitment to negotiate an international agreement such as the withdrawal agreement. The WAB agrees to withdraw Boris Johnson, which is a draft international treaty, into British law and gives the government permission to ratify it. With regard to the objectives of these negotiations, the Labour Bank has tabled amendments aimed at maintaining close relations with the EU and providing for a two-year extension of the default (which UK law could not do without EU approval). After the WAB becomes law, the withdrawal agreement must also be ratified by the European Parliament. After winning a Conservative majority in the elections, the law was revised and reintroduced on 19 December, after being passed at second reading the following day.
The revision of the law in December repealed the provisions adopted in previous versions of parliamentary control of the Brexit negotiations.  The bill, originally described by The Independent as a « plunging » towards Conservative rebels, would have allowed MPs to review each « line by line » agreement and make changes.  Conservative MP Steve Baker wrote to The Times stating that the new bill « gives any agreement that we have a good reputation with the EU in British law » and that it is compatible with the referendum result of « giving more control over how we are governed by the British Parliament. »  On July 24, 2018, the government presented a white paper on the bill and how the legislation works.  The bill was first introduced by the government at the second session stagnated on 21 October 2019 by the government, entitled « A Bill to Implement, and make other provision in connection with, the agreement between the United Kingdom and the EU under Art 50, paragraph 2 of the Treaty on European Union which sets the arrangements for the rekingdom from the EU ».  This bill was not discussed further after second reading in the House of Commons on October 22, 2019, and passed on November 6, when Parliament was dissolved in preparation for the 2019 general election.