- The Schengen Agreement of 14 June 1985 on the gradual abolition of border controls on common borders.
- The Convention implementing the Schengen agreement of 19 June 1990.
- The Protocols and Acts of Accession of Italy, Spain, Portugal, Austria, Finland, Denmark, and Sweden, along with the final acts, minutes, statements and their joint declarations, all of which were ratified by Greece in Law 2514/1997 (G.G. 140 Α' of 27 June 1997, page 5735).
- Decisions of the Schengen executive committee, which have been approved by our country by Joint Ministerial Decision file no. 0544/Draft Number 811/M 4244 of 13th January 1998 (G.G. 18 Α΄ /26.01.1998, p. 277) and Joint Ministerial Decision of 27 October 1999 (G.G. 247 A΄/17.11.1999, p. 4541).
- The Schengen acquis, which, pursuant to protocol 2 to the Treaty of Amsterdam of 2 October 1997, is part of community law.
- The Community acquis on visas which is implemented by Regulation No. 539/2001 (as recently amended regarding the lists of the third countries whose nationals must be in possession of visas when crossing the external borders and those whose nationals are exempt from that requirement 1932/2006 of 21/12/2006, ΕΕ L 405 of 30/12/2006) listing the third countries whose nationals must be in possession of visas when crossing the external borders and those whose nationals are exempt from that requirement. The same Regulation also determines the procedures and conditions for the issuance of visas, as defined in the Schengen convention and implementing measures and, in particular, Common Consular Instructions (CCI).
- The Common Consular Instructions (CCI), which include, among other things, provisions on technical and organisational issues on procedures for the issuance of visas, such as reception of visa applications, the form of the visa to be issued, the competent member state for examining the application, the terms and documents required for the application’s approval, its examination, the decision regarding the issuance or not of the visa, etc.