These Regulations are made in exercise of the powers in section 8(1) of, and paragraph 21 of Schedule 7 to, the European Union (Withdrawal) Act 2018 (c.16) in order to address failures of retained EU law to operate effectively and other deficiencies (in particular under 8(2)(a), (b), (c), (d) and (g)) arising from the withdrawal of the United Kingdom from the European Union.
Link: The Railways (Amendment) (EU Exit) Regulations (Northern Ireland) 2019
Source: Legislation .gov.uk
