MOVEMENT OF PERSONS · EUROPEAN BORDERS
The Schengen Agreement
Historical development, participating countries, short stays, border checks and legal safeguards in the Schengen area.
The Schengen area combines the general abolition of checks on persons at internal borders with common criteria for checks at external borders. The regime also benefits third-country nationals lawfully admitted, without equating their status with that of European citizens or granting general permission to work or reside.
The European Union, Schengen area and customs union are distinct arrangements. Immigration checks on persons differ from controls on goods, and movement without ordinary internal border checks does not remove documentary requirements, police powers or legal conditions of stay.
1. From the 1985 Agreement to the present legal framework
The name refers to Schengen in Luxembourg, where Germany, Belgium, France, Luxembourg and the Netherlands signed the agreement on 14 June 1985. The Convention implementing it was signed in 1990. Those instruments were therefore not concluded in October 1997 through the Treaty of Amsterdam.
The Treaty of Amsterdam, signed in 1997 and effective from 1999, incorporated the Schengen acquis into the European Union framework. The Treaty of Lisbon, signed in 2007 and effective from 2009, represents a later stage in Europe’s legal organisation. The current framework derives from those instruments and subsequent legislation, including Regulation (EU) 2016/399, the Schengen Borders Code. No single treaty independently exhausts the regimes governing visas, asylum, immigration and police cooperation.
References: Council of the European Union: Schengen area; European Parliament: treaties.
2. Participating countries and the position of Cyprus and Ireland
At the review date, the area without ordinary internal border checks comprises 29 countries: Germany, Austria, Belgium, Bulgaria, Croatia, Denmark, Slovakia, Slovenia, Spain, Estonia, Finland, France, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Norway, the Netherlands, Poland, Portugal, Czechia, Romania, Sweden and Switzerland.
Bulgaria and Romania joined this regime fully on 1 January 2025 following the removal of checks at internal land borders. Checks at internal borders with Cyprus have not yet been abolished, and Ireland does not participate in the Schengen area. Iceland, Liechtenstein, Norway and Switzerland participate without being European Union members. Union membership and effective participation in the regime therefore cannot be treated as equivalent.
Travel destinations must be checked against each country’s entry rules and any temporary controls. Reference: composition and operation of the Schengen area.
3. Short stays: 90 days in any 180-day period
Article 6 of the Schengen Borders Code provides for short stays of up to 90 days in any 180-day period for third-country nationals covered by the general rule. The window is rolling: the relevant 180-day period is examined on each day of stay. Entry and exit dates both count as days of presence.
The calculation is cumulative across states operating the EES. Moving from Portugal to France or Spain does not create a new allowance of 90 days. Nor does a brief departure itself restart the calculation. Time authorised by a residence permit or long-stay visa, and situations covered by European free-movement law, require separate assessment. Three months should not indiscriminately replace the statutory calculation in days.
The short-stay limit is not general permission to work or reside. The travel purpose, document presented and traveller’s applicable regime must be checked. Reference: Schengen Borders Code, Article 6.
4. Documents and entry conditions
Visa exemption, where applicable, does not mean unconditional admission. Authorities may examine the travel document, purpose and conditions of stay, means of subsistence, return or onward itinerary and legally relevant obstacles to entry. Article 6’s general rule requires a document issued within the preceding ten years and valid for at least three months after the intended departure, subject to the statutory exception for a justified emergency.
An invitation, accommodation reservation, return ticket and other documents may be relevant to the trip. No single financial amount or documentary package is sufficient in every situation. Children must have their own documentation, alongside any requirements for travel authorisation, custody or representation applicable to the particular case.
References: Schengen Borders Code; European Union: documents and conditions for third-country nationals.
5. Refusal of entry and international protection
Under Article 14 of the Code, refusal requires a reasoned decision by the competent authority, stating the grounds and permitting an appeal under national law. The appeal does not automatically suspend the decision. Any need for urgent relief and the form of challenge depend on the procedure and jurisdiction concerned.
Refusal of entry, detention, a return decision and enforcement of removal are distinct measures with their own conditions and safeguards. Border checks do not justify assuming that anyone with an unresolved matter will be prevented from leaving, arrested or removed. Article 4 requires individual decisions and respect for fundamental rights, obligations concerning access to international protection and non-refoulement. An asylum application is not itself a ground for automatic return to the country of origin.
Reference: Schengen Borders Code, Articles 4 and 14.
6. SIS: alerts and cooperation between authorities
The Schengen Information System, SIS, enables sharing of alerts in legally defined categories. These include certain return or refusal-of-entry-and-stay decisions, persons wanted for arrest, missing persons, sought objects and situations requiring protection of vulnerable persons.
Preventive alerts also cover children at risk of abduction by parents, relatives or guardians. Their entry and the corresponding measures depend on competent authorities and applicable requirements; the system does not replace a custody decision, travel authorisation or return proceedings under the 1980 Hague Convention. A family dispute or debt cannot, without a legal basis, be equated with an arrest alert.
Action depends on the alert’s category, grounds and specified measure. Reference: European Commission: SIS categories and data.
7. Frontex and the limits of border management
Frontex, the European Border and Coast Guard Agency, participates in integrated border management and provides operational support to states, including return activities within its mandate. That work neither removes national authorities’ responsibilities nor turns the agency into a general health, agricultural and veterinary authority.
Security cooperation likewise does not make Frontex, Europol, Interpol and CEPOL interchangeable: each acts under its own competences and instruments. Border control, criminal investigation, police training and customs checks must be distinguished.
The legal framework requires respect for fundamental rights and international protection, including non-refoulement. Frontex itself maintains monitoring and complaints mechanisms concerning possible violations. Its role cannot accurately be described as indiscriminate return of migrants and refugees to their countries of origin. Reference: Frontex: fundamental rights and safeguards.
8. Temporary reintroduction of internal border controls
The ordinary absence of checks on persons at internal borders under Article 22 of the Code is subject to exceptions. Article 25 permits temporary reintroduction of controls in response to a serious threat to public policy or internal security, as a last resort and subject to necessity, proportionality and applicable procedures.
This is not a general suspension or termination of the agreement. The measure may affect particular borders and periods without automatically displacing other rights and obligations. Internal police powers also remain where they do not have an effect equivalent to border checks. Before crossing a border, check the measures in force and carry the required documents.
Reference: Schengen Borders Code, Articles 22 and 25.
9. EES and ETIAS: separate systems
The EES electronically records entries, exits and refusals of entry for travellers within its scope, with the required personal and biometric data. According to the official portal consulted, progressive implementation ended on 9 April 2026 and the system became fully operational on 10 April 2026. Registration does not grant additional time to stay.
ETIAS is a separate advance travel-authorisation system for those within its scope. On 18 October 2026, the official portal stated that it was not yet operational and was not accepting applications. The timetable should be checked again before travel. Once operational, authorisation will remain distinct from a visa or residence permit and will not constitute general permission to work.
References: official EES portal; official ETIAS portal.
10. Travel planning and comparison with Mercosur
Preparation requires identifying the countries actually included in the itinerary, calculating days already used, checking document validity and confirming the admissible purpose of the stay. Residence, work, family reunification and international protection have their own requirements. Where a child, custody dispute or court restriction is involved, authorisations and decisions must be examined before departure.
Mercosur has its own instruments on movement, travel documents and residence. Institutional comparison is possible, but does not justify automatically applying the Schengen model to South America or presuming the absence of immigration checks. The relevant instrument and its application to the countries and person concerned must be identified.
References: Mercosur: movement of persons; European Union: travel documents.