<ul><li><a href=https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=wdu20011251371 target=_blank>Law on Road Transport(Ustawa o transporcie drogowym, Dz.U. 2001 Nr 125 poz. 1371, Dz. U. z 2017 r. poz. 2200, z 2018 r. poz. 12, 79, 138, 650, 6 September 2001, last updated on 1 March 2022)</a></li><li><a href=http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A31989R4058 target=_blank>Regulation 4058/89 on the fixing of rates for the carriage of goods by road between Member States(Regulation (EEC) No 4058/89 on the fixing of rates for the carriage of goods by road between Member States, OJ L 390, p. 1, adopted on 21 December 1989, Articles 1 and 2)</a></li></ul>