These Regulations (with the exception of Schedule 1) 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 (in particular arising under paragraphs (d), (f) and (g) of section 8(2) of the Act) arising from the withdrawal of the United Kingdom from the European Union.
Link: The Accounts and Reports (Amendment) (EU Exit) Regulations 2019
Source: Legislation .gov.uk