<ul><li><a href=http://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1450274230063&uri=CELEX:32013R0952 target=_blank>EU Regulation laying down the Union Customs Code(Regulation (EU) No 952/2013 of the European Parliament and of the Council of 9 October 2013 laying down the Union Customs Code, OJ L 269, 10.10.2013, p. 1–101, article 71)</a></li><li><a href=https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20040680622 target=_blank>Custom Act(Ustawa Prawo Celne, Dz.U. 2004 Nr 68 poz. 622, 19 March 2004, last updated on 1 July 2021 , Chapter 6)</a></li><li><a href=https://ec.europa.eu/growth/tools-databases/regprof/home target=_blank>Website of the European Commission, Regulated Professions Database</a></li></ul>