The ETIAS travel authorization allows access to all countries entering the Schengen agreement, i.e. the ETIAS and Schengen countries are identical, and a ETIAS authorisation is practically a Schengen visa. Originally, the Schengen treaties and the rules adopted between them were officially independent of the EEC and its successor, the European Union (EU). In 1999, the Treaty of Amsterdam incorporated them into EU law, which codified Schengen into EU law and also introduced opt-outs for Ireland and the Kingdom, the latter having taken place since its withdrawal from the EU. EU Member States that do not yet have an opt-out and have not yet joined the Schengen area are legally obliged to do so if they meet the technical requirements. Although it is linked to EU legislation, several third countries are present in this region after signing the agreement. It takes its name from the City of Schengen in Luxembourg, where the agreement was signed in 1985. It came into force in 1995. The United Kingdom and Ireland participated in certain aspects of the Schengen Agreement from 2000 and 2002, such as the Schengen Information System (SIS).
As we approach the implementation of ETIAS, it is understandable that there is a lot of confusion about what people need to do before they go to Europe. Part of this confusion is the result of a misunderstanding about the schengen countries, ETIAS countries and EU countries. There is a specific procedure for the use of Article 29: Member States must ask EU institutions to recommend border controls. The Council of the European Union, made up of ministers from each EU country, then issues this recommendation and the members follow it. This is exactly what happened on 12 May 2016, when the Council recommended that Austria, Denmark, Germany, Sweden and Norway extend their controls by six months. Relations between Iceland and Norway, on the one hand, and Ireland and the United Kingdom, on the other, in the areas of the Schengen acquis applicable to Iceland and Norway are governed by an agreement approved by the Council of the European Union on 28 June 1999. In December 1996, two non-EU states, Norway and Iceland, signed an association agreement with the countries that signed the Schengen accession agreement. Although this agreement never entered into force, the two countries were part of the Schengen area following similar agreements with the EU.  The Schengen Agreement itself was not signed by non-EU states.  In 2009, Switzerland officially concluded its accession to the Schengen area by adopting an association agreement by referendum in 2005.  A short-stay visa costs 60 euros (46 USD; 66 USD) but only 35 EUROS for Russians, Ukrainians and citizens of some other countries as part of the facilitation of issuing visas. The two Schengen agreements have been a major step forward for transport in Europe.
Queues would often be one kilometre long and wait for border patrols to sign them, but the agreements helped to stop them. Today, people can enter neighbouring countries without having to present any form of identity card. Of course, airlines always require you to show it for security reasons, but border controls are much easier to navigate and don`t even exist in some cases.