Below you can find legal sources governing Schengen visa:
Regulation (EC) No
810/2009 of the European Parliament and of the Council of 13 July 2009 establishing a Community Code on Visas (Visa Code)
Regulation (EC) No
1987/2006 of the European Parliament and of the Council of 20 December 2006 on the establishment, operation and use of the second generation Schengen Information System (SIS II)
The Schengen acquis –
Schengen Acquis agreement between the Governments of the States of the Benelux Economic Union, the Federal Republic of Germany and the French Republic on the gradual abolition of checks at their common borders
The Schengen acquis –
Schengen Acquis convention implementing the Schengen Agreement of 14 June 1985 between the Governments of the States of the Benelux Economic Union, the Federal Republic of Germany and the French Republic on the gradual abolition of checks at their common borders