Treaty concerning the accession of the Republic of Bulgaria and Romania to the European Union (2005)
“ The European Union stresses the strong elements of differentiation and flexibility in the arrangement for the free movement of workers. Member States shall endeavour to grant increased labour market access to Romanian nationals under national law, with a view to speeding up the approximation to the acquis. As a consequence, the employment opportunities in the European Union for Romanian nationals should improve substantially upon Romania's accession. ”
