A number of bilateral and multilateral free trade agreements have made goods controls less intrusive; The completion of the European internal market in 1992 led to the end of goods controls. However, during the riots in Northern Ireland, British military checkpoints occurred at major border crossings and British security forces made some, but not all, crossing points impassable. In 2005, in the implementation phase of the 1998 Good Friday Agreement, the last of the border checkpoints was abolished.  Finally, Mrs May`s agreement was rejected and the backstop was replaced by the Northern Ireland protocol. If compliance is still not restored as a result of these measures, the parties are allowed to appropriately suspend the application of the withdrawal agreement itself, with the exception of the rights of citizens or parties to other agreements between the Union and the United Kingdom. In order to avoid a border between Northern Ireland and the rest of the United Kingdom, Article 6 of the Northern Ireland Protocol proposes that the United Kingdom and EU customs officers act as one from the end of the transition period (December 31, 2020) until the parties agree on a satisfactory alternative for both parties.  The single customs territory between the UK and the EU does not apply to fish products: for example, fish transported from Britain to Northern Ireland would be subject to EU tariffs in the absence of a separate fishing agreement.  If there is no agreement between the two parties, then the default position is that rates must be paid for all goods. On 23 June 2016, the United Kingdom voted by a majority of 51.9% against 48.1% in favour of leaving the European Union, with a turnout of almost 72%. This has put the UK on track to leave the EU, but has left all the details of its withdrawal unresolved. The timetable was set on 29 March, when British Prime Minister Theresa May took the formal step required by EU legislation to launch the withdrawal process to trigger Article 50 of the Lisbon Treaty. In July 2019, Boris Johnson succeeded Theresa May as British Prime Minister after the House of Commons rejected a withdrawal agreement it had reached with the EU over the terms of the UK`s withdrawal. There followed lengthy negotiations on the details of the UK`s withdrawal and the revision of the withdrawal agreement.
In addition, paragraph 50 stressed that there would be no new controls on goods and services to be transferred from Northern Ireland to Britain. In 2018, point 50 of the final eu withdrawal agreement was omitted on the grounds that it was an internal matter in the UK. The final withdrawal agreement for 2018 was originally approved by the British Prime Minister (Theresa May), but the DUP (whose minority government depended on confidence and supply support) vetoed a parliamentary vote in January 2019.  The Irish backstop was a protocol of the (un ratified) Brexit withdrawal agreement that would have kept the United Kingdom (generally) in the customs union of the European Union and Northern Ireland (in particular) on certain aspects of the European internal market until a solution was found to avoid a hard border. This should not compromise the Good Friday agreement and preserve the integrity of the European internal market. This would only have come into effect if there were no other solutions before the end of the (agreed) transition period. Mr Gove suggested that without an agreement on the Irish border regime after Brexit, the so-called Northern Ireland Protocol, goods going to Northern Ireland would have been subject to customs duties.