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This is EUR-Lex. You can find inter alia the EU's primary and secondary law here. Please, find the Treaty on the Functioning of the European Union (TFEU), Articles 45-55 TFEU and Directive 2004/38 on right of citizens of the Union and their family members to move and reside freely in the territory of the Member States. The link: http://eur-lex.europa.eu/en/treaties/index.htm
