These Regulations are made in exercise of the powers in sections 8(1) and 23(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 under section 8(2)(a), (f) and (g)) arising from the withdrawal of the UK from the European Union.
Link: The Quality and Safety of Organs Intended for Transplantation (Amendment) (EU Exit) Regulations 2019
Source: Legislation .gov.uk