These Regulations are made in exercise of the powers in the European Union (Withdrawal) Act 2018 (c. 16) in order to address failures of domestic legislation to operate effectively and other deficiencies (in particular under paragraphs (a), (d) and (g) of section 8(2)) arising from the withdrawal of the United Kingdom from the European Union.
Link: The Zoonotic Disease Eradication and Control (Amendment) (England) (EU Exit) Regulations 2018
Source: Legislation .gov.uk
