<ul><li><a href=https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A01997L0067-20080227 target=_blank>Directive 97/67/CE on common rules for the development of the internal market of Community postal services and the improvement of quality of service(Directive 97/67/EC of the European Parliament and of the Council of 15 December 1997 on common rules for the development of the internal market of Community postal services and the improvement of quality of service, OJ L 15, p. 14–25, adopted on 15 December 1997, last amended on 20 February 2008 by Directive 2008/6/EC, Article 9(3))</a></li></ul>