<ul><li><a href=https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1590747427251&uri=CELEX:32018R0644 target=_blank>Regulation (EU) 2018/644 of 18 April 2018 on cross-border parcel delivery services(Regulation (EU) 2018/644 of the European Parliament and of the Council of 18 April 2018 on cross-border parcel delivery services. Article 6. )</a></li><li><a href=http://www.pgdlisboa.pt/leis/lei_mostra_articulado.php?nid=1953&tabela=leis&ficha=1&pagina=1& target=_blank>Law 17/2012 which establishes the legal  regime applicable to the provision of postal services and  transposes the  Directive 2008/6/EC of the European Parliament and the Council with regard to the full accomplishment of the internal market of Community postal services( Lei que estabelece o regime jurídico aplicável à prestação de serviços postais, em plena concorrência, no território nacional, bem como de serviços internacionais com origem ou destino no território nacional, Adopted 26/04/2012, Last modification 04/04/2014, Articles 14 and 36 )</a></li></ul>