EU citizens hold this right on the basis of primary legislation as a result of the emergence of the concept of EU citizenship; they also enjoy the right under derived legislation, specifically under Directive 2004/38/EC (CRD).
Slíkir ESB ríkisborgarar njóta réttinda samkvæmt frumlöggjöf vegna tilkomu hugtaksins sambandsborgararéttur en einnig réttinda samkvæmt afleiddri löggjöf, nánar tiltekið undir sambandsborgaratilskipun 2004/38/EB.