The definitive stage of the European Union’s (EU) Carbon Border Adjustment Mechanism (CBAM), including financial obligations, commences on 1 January 2026, following the expiration of the transitional three‑year reporting phase. To prepare, the European Commission published on Wednesday eight Implementing Acts covering, among other topics, default values, verification principles, registry rules, authorisation procedures and pricing of CBAM certificates. In parallel, the Commission proposed a regulation amending the CBAM to increase significantly the scope to cover steel and aluminium intensive derivative products.