http://www.legislation.gov.uk/eudn/2004/512/article/2Council Decision of 8 June 2004 establishing the Visa Information System (VIS) (2004/512/EC)Council Decision of 8 June 2004 establishing the Visa Information System (VIS) (2004/512/EC)2020-12-11King's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02004D0512-20190611texttext/xmlen2019-06-11
Article 21.

The Central Visa Information System, the National Interface in each Member State, and the communication infrastructure between the Central Visa Information System and the National Interfaces shall be developed by the Commission.

2.

The national infrastructures shall be adapted and/or developed by the Member States.