Section 21(1)

In this Act— “assimilated law” has the meaning given by section 5(1); “devolved authority” means— the Scottish Ministers, the Welsh Ministers, or a Northern Ireland department; “domestic law” means the law of England and Wales, Scotland or Northern Ireland; “enactment” means— an enactment (whenever passed or made) contained in, or in an instrument made under, any primary legislation, or any assimilated direct legislation; “Minister of the Crown” has the same meaning as in the Ministers of the Crown Act 1975 and also includes the Commissioners for His Majesty’s Revenue and Customs; “modify” includes amend, repeal or revoke (and related expressions are to be read accordingly); “Northern Ireland devolved authority” means— the First Minister and deputy First Minister acting jointly, a Northern Ireland Minister, or a Northern Ireland department; “primary legislation” means— an Act of Parliament, an Act of the Scottish Parliament, an Act or Measure of Senedd Cymru, or Northern Ireland legislation; “relevant national authority” means— a Minister of the Crown, a devolved authority, or a Minister of the Crown acting jointly with one or more devolved authorities; “secondary assimilated law” has the meaning given by section 12(2); “secondary retained EU law” has the meaning given by section 11(2); “subordinate legislation” means— an instrument (other than an instrument that is Northern Ireland legislation) made under any primary legislation, or an instrument made on or after IP completion day under any assimilated direct legislation.

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Source: legislation.gov.uk · retrieved 2026-07-30