These Regulations are made in exercise of the powers conferred by the European Union (Withdrawal) Act 2018 (c. 16) in order to address failures of EU derived law to operate effectively and other deficiencies (in particular section 8(2) (c), (d) and (g)) arising from the withdrawal of the UK from the European Union.
Link: The Marketing of Seeds and Plant Propagating Material (Amendment) (Northern Ireland) (EU Exit) Regulations 2019
Source: Legislation .gov.uk
