“The CTA helps support annual trade between our countries worth 70 billion euros. This has resulted in more Irish directors of British companies than any other foreign nationality, and it has helped to make Irish companies the fifth largest foreign companies of British companies,” he said. The agreement, which is the culmination of more than two years of work between the two governments, means that the rights of citizens of both countries will be protected after Brexit, while ensuring that Ireland continues to meet its obligations under EU law. The agreement came into force on 31 January 2020, when the UK effectively left the European Union. The relevant authorities have worked together to reach a revised agreement on the social security of Ireland or the United Kingdom. Your intention to implement this bilateral agreement should allow the UK to leave the EU. Prior to the creation of the Irish Free State, British immigration legislation was considered part of the United Kingdom in Ireland. With Ireland`s independence in 1922, the British Home Office was not inclined to introduce passport and immigration controls between Ireland and Northern Ireland, which would have meant patrolling a porous and outdated land border of 499 km. However, if the situation were to continue before 1922, the Irish immigration authorities would have to continue to apply British immigration policy after independence. The Irish Ministry of the Interior was sensitive to the continuation of the status quo and, in February 1923, an informal agreement was reached on this issue: each party would apply the other party`s immigration decisions and the Irish authorities would receive a copy of the British Code of Suspects (or “Black Book”) of non gratae for personal use in the United Kingdom.  The British and Irish governments have signed an agreement which, for the first time, formally describes the provisions of the Common Travel Area (CTA) and guarantees the reciprocal rights it confers independently of Brexit.
When the agreement on the common travel area began in 1922, it was not included in any legislation. It was an agreement between Ireland and the United Kingdom on the basis of their shared history. Over time, certain rights have been introduced into different legislation, both in Ireland and in the United Kingdom. The Common Travel Area (CTA) is a long-standing agreement between the United Kingdom, the Crown Dependencies (Bailiwick of Jersey, Bailiwick of Guernsey and the Isle of Man) and Ireland, which precedes and does not depend on British and Irish membership of the EU. The agreement was provided for by BRITISH law by designating the Irish Free State as part of the United Kingdom for the purposes of immigration legislation.  It was fully implemented in 1925, when legislation in both countries provided for recognition of the landing conditions of other countries for foreigners.  This can be considered the culmination of the CTA – although it was not so called at the time – since it was almost in a common immigration zone.