<ul><li><a href=https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv:OJ.L_.2021.137.01.0001.01.ENG target=_blank>Commission Delegated Regulation (EU) 2021/654(Commission Delegated Regulation (EU) 2021/654 supplementing Directive (EU) 2018/1972 of the European Parliament and of the Council by setting a single maximum Union-wide mobile voice termination rate and a single maximum Union-wide fixed voice termination rate, OJ L 137, p. 1–9, adopted on 18 December 2020, Article 1(3))</a></li><li><a href=https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=wdu20041711800 target=_blank>Telecommunication Act(Ustawa Prawo telekomunikacyjne, Dz.U. 2004 nr 171 poz. 1800, Dz. U. z 2017 r. poz. 1907, 2201, z 2018 r. poz. 138, 650., 16 July 2004,  last updated on 3 March 2022, Articles 34, 44 and 46.2  )</a></li></ul>