These Regulations are made in exercise of the powers conferred by sections 8(1) and 23(1) and (2) of, and paragraph 21(b) of Schedule 7 to, the European Union (Withdrawal) Act 2018 (c. 16) (“the Withdrawal Act”).
Link: The European Union (Withdrawal) Act 2018 (Consequential Modifications and Repeals and Revocations) (EU Exit) Regulations 2019
Source: Legislation .gov.uk