From 15 December 2025, the infrastructure consent regime under Infrastructure (Wales) Act 2024 (I(W)A 2024) largely replaces the Developments of National Significance (DNS) regime for specified categories of major infrastructure in Wales. From this date, DNS operates mainly under transitional and saving provisions only.
See Practice Notes: Infrastructure consent in Wales and Permission for Developments of National Significance in Wales.
I(W)A 2024 establishes a unified consenting process for the development of certain types of infrastructure in Wales and in Welsh waters. Projects that fall within the definition of a significant infrastructure project (SIP) require infrastructure consent in the form of an infrastructure consent order (ICO) made by the Welsh Ministers.
The Act received Royal Assent on 3 June 2024. The SIP categories and regulation-making powers came into force on 4 June 2024, with the bulk of the infrastructure consent regime brought into force on 15 December 2025. Remaining provisions concern changing or revoking ICOs, compensation and related fees.
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