On January 21, 2020, the House of Lords passed the law after passing five amendments. However, these amendments were overturned by the House of Commons the next day.   On 13 November 2017, Brexit Minister David Davis announced a bill to enshrine the withdrawal agreement in national law through primary legislation. In further talks in the House of Commons, Davis said that if the UK decided not to pass the law on 29 March 2019, the UK would remain on track to leave the EU without a deal, having invoked Article 50 in March 2017, following the adoption of the Notification of Withdrawal Act 2017.  The bill was reintroduced immediately after the general election and was the first bill introduced in the House of Commons in the first session of the 58th Parliament with amendments to the previous bill by the re-elected government, and was read for the first time on December 19, just after the first reading of the Outlawries Bill and before the start of the debate on the Queen`s Speech. The second reading took place on 20 December and the third reading on 9 January 2020. This triggered Article 50 of the Treaty on the European Union, which defines the procedure for the withdrawal of an EU member state, thus opening a two-year countdown to withdrawal. On January 22, 2020, the law was passed by the House of Lords without further amendment. The next day she obtained royal approval.   The bill, originally described by The Independent as a “diving” 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.”  services.parliament.uk/Bills/2019-20/europeanunionwithdrawalagreement/documents.html The government presents a delegated memorandum of authority for all public bills (including hybrids) to justify the devolution of powers, usually to ministers, in the bill.
The bill was first introduced in Parliament on 21 October 2019, but expired on 6 November with the dissolution of Parliament in preparation for the December 2019 parliamentary elections.