<ul><li><a href=https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1555406158601&uri=CELEX:02012L0034-20190101 target=_blank>Directive 2012/34/EU establishing a single European railway area(EU Directive 2012/34/EU of the Europian parliament and of the Council of 21 November 2012 establishing a single European railway area. Last amended on the 14th of  Decembre 2016 by the Directive 2016/2370. (article 47) .)</a></li></ul>