SI 2019/137 The Export Control (Amendment) (EU Exit) Regulations 2019 (link)
These Regulations are made in exercise of the powers conferred by section 8(1) of the European Union (Withdrawal) Act 2018 and section 1(5) and 2(5) of the Export Control Act 2002. The powers conferred by section 8(1) of the European Union (Withdrawal) Act 2018 are exercised in order to address failures of retained EU law to operate effectively and other deficiencies (in particular under paragraph (a), (c), (d) and (g) of section 8(2) of that Act) arising from the withdrawal of the UK from the European Union.
These Regulations make amendments to legislation in the field of customs and in particular in relation to export and other trade controls on military and dual-use goods (goods which have both a civilian and a military use). Part 2 amends subordinate legislation. The provisions include provisions within secondary legislation which relate to reciprocal arrangements between the UK and the EU or a Member State of the EU and contain EU references which are no longer appropriate. Upon the withdrawal of the United Kingdom from the EU, these reciprocal arrangements will no longer exist.
Source: HMSO.