Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Sector definition

What does Sector mean? In legal practice, sector describes a category of economic activity or group of undertakings with shared products, services or regulation (for example energy, telecommunications, financial services or media), used to frame regulatory, contractual and transactional analysis. The term is generally descriptive rather than a single defined legal term, but specific statutes define sectors for particular purposes: in the UK, anti-money laundering law refers to the “regulated sector”, public procurement law identifies the “utilities sectors”, and national security screening specifies “sensitive sectors” for notifiable acquisitions; Irish legislation uses analogous concepts (for example “designated persons” for AML and sector-specific procurement directives). Usage...

Offshore oil and gas safety case regime (Great Britain/UKCS): operators' duties, CMAPP/SEMS, verification and well examination, OMAR oversight, and post-Brexit assimilated law changes

Published by a LexisNexis Energy expert

Practice notes

Brexit Impact

At 11 pm (GMT) on 31 December 2020 the Brexit transition/implementation phase concluded following the UK’s exit from the EU. At this moment—termed in UK law ‘IP completion day’—principal transitional measures ceased and notable alterations started to apply across the UK legal framework. This note offers guidance on areas affected by these developments.

On IP completion day, the European Union (Withdrawal) Act 2018 (EU(W)A 2018) established a new strand of domestic UK law—retained EU law (REUL)—made up of EU-derived rights and legislation preserved in the UK post-Brexit. On 29 June 2023, the Retained EU Law (Revocation and Reform) Act 2023 (REUL(RR)A 2023) received Royal Assent. REUL(RR)A 2023 reshapes the treatment of REUL by:

revoking substantial parts of REUL from 31 December 2023
rebranding REUL as ‘assimilated law’ from 1 January 2024
creating new powers in relation to assimilated law

This reclassification of REUL (and related terms) to assimilated law marks a shift in its status and handling under UK law, such that it is generally to be interpreted in line with ordinary domestic law and principles. From 1 January...

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Web page updated on 28/05/2026

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