The UK bans Enzacamene from cosmetics on 15 July — and the same SKU can stay legal one border away, in Northern Ireland

What SI 2026/23 actually does, and when

The Cosmetic Products Regulation (EC) No 1223/2009 (Restriction of Chemical Substances) (Amendment and Transitional Provisions) Regulations 2026 — SI 2026/23 — was laid before Parliament on 15 January 2026. It is made law, not a consultation. Its core provisions come into force on 15 July 2026, with one exception: regulation 2(3), which adds a further batch of substances to the prohibited list, comes into force a month later, on 15 August 2026.

One country, two cosmetics regimes

SI 2026/23 amends the retained EU Cosmetic Products Regulation as it applies in Great Britain only. Northern Ireland is not part of this instrument — under the Windsor Framework, it continues to follow the EU Cosmetics Regulation directly, including the EU’s own, separately timed batch of CMR restrictions. A brand selling the same SKU across the UK is not managing one ruleset with one deadline; it is managing two, on two different calendars, decided by two different legislators.

Why this is a product-data problem, not just a reformulation one

Reformulating out Enzacamene, or the 16 newly restricted CMR substances, is the visible part. The harder part is knowing which SKUs are affected at all. The formaldehyde change is the sharpest example: the labelling trigger drops by a factor of 50, from 0.05% to 0.001% — a concentration most formulation records were never built to track at that resolution. A brand needs, per SKU, the exact release concentration of every formaldehyde-releasing preservative it uses, not just a pass/fail against the old threshold.

Layer the GB/Northern Ireland split on top, and “UK” stops being a valid row in a compliance tracker. The same SKU needs a market flag — GB or NI — mapped to two different substance lists and two different deadlines, kept current as each legislator moves independently. That mapping, per product and per market, updated as the rules change on their own separate clocks, is exactly the discipline Cleo’s engine MARIA is built to hold.