These Regulations are made in exercise of the powers conferred by section 8(1) of the European Union (Withdrawal) Act 2018 (c.16) in order to address failures of retained EU law to operate effectively and other deficiencies arising from the withdrawal of the United Kingdom from the European Union (in particular under paragraphs (b), (c), (d) and (g) of section 8(2)), and in exercise of the powers conferred by section 23(1) and (2) of, and paragraph 21 of Schedule 7 to, that Act, to make consequential and incidental amendments.
Link: The Rail Passengers’ Rights and Obligations (Amendment) (EU Exit) Regulations 2018
Source: Legislation .gov.uk