This Practice Note describes the Electronic Commerce (EC Directive) Regulations 2002 (E-Commerce Regulations 2002), SI 2002/2013 as they apply to businesses established in the UK, including key definitions, obligations and statutory defences. Background and divergence The position in the UK The E-Commerce Regulations 2002 gave effect in the UK to Directive 2000/31/EC (OJ L 178/1), the EU E-Commerce Directive. Following the end of the Brexit implementation period (being 11 pm on 31 December 2020), the E-Commerce Regulations 2002 became part of the body of EU retained law applicable in the UK, as amended by the Electronic Commerce (Amendment etc) (EU Exit) Regulations 2019, SI 2019/87. From 1 January 2024, retained EU law is ‘assimilated’ into domestic law by virtue of the fact it is generally stripped of EU-derived interpretive effects (eg supremacy of EU law, directly effective rights, and general principles previously retained under the European Union (Withdrawal) Act 2018 (EU(W)A 2018)). For more information, see Practice Note: Assimilated law. UK businesses that are information society service providers (ISSPs) are subject to the provisions of the E-Commerce