These Regulations 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 EU law to operate effectively and other deficiencies (in particular under paragraphs (a), (b), (c), (d) and (g) of subsection (2)) arising from the withdrawal of the United Kingdom from the European Union.
Link: The Trade etc. in Dual-Use Items and Firearms etc. (Amendment) (EU Exit) Regulations 2019
Source: Legislation .gov.uk