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CE marking

CE marking is only required for products covered by harmonised EU rules that specifically mandate it. The manufacturer affixes it on their own responsibility after completing the required conformity assessment (self-assessment where the legislation allows it, otherwise involving a notified body). The mark must be visible, legible and indelible, at least 5mm high, with the notified body's ID number next to it where one was involved.

UKCA marking

UKCA applies in Great Britain (England, Scotland and Wales); it is not used in Northern Ireland, which has separate arrangements. The UK continues to recognise the CE marking, alongside or in place of the UKCA marking, for most goods on the Great Britain market — businesses can choose which conformity process to use. Some sectors (construction products, medical devices, rail products, marine equipment) have their own rules. UKCA may currently be placed on a label or accompanying document until 31 December 2027.

Sectoral compliance

No single federal conformity marking exists. Compliance is sectoral: CPSC rules require manufacturers/importers of general-use consumer products subject to a safety rule to certify compliance in a General Certificate of Conformity (GCC, first-party testing allowed), while children's products need a Children's Product Certificate (CPC) backed by testing at a third-party CPSC-accepted laboratory. RF/electronic devices additionally need FCC equipment authorisation, and state laws (e.g. California Proposition 65) add labelling duties.