De-designate / Dedesignation meaning

In practice, de-designation (or dedesignation) means ending or narrowing a previous designation so that a nuclear installation, site or facility (or part of it) is no longer covered. In the UK nuclear decommissioning regime under the energy act 2004, this is achieved by a formal direction revoking or varying (amending) an existing Designating Direction. For sites in England, Wales and Northern Ireland the direction is made by the Secretary of State; for sites in Scotland it is made by the Scottish Ministers. The effect is that the relevant designation ceases to apply and the Nuclear Decommissioning Authority’s (NDA) corresponding statutory clean-up and decommissioning duties fall away for that site or part. De-designation can be whole or partial (by variation), and often follows completion of agreed milestones or a change in programme or policy. The term is routinely encountered in NDA contracting, site transfer and regulatory planning. Usage and effect are consistent across the UK under the 2004 Act. It is not a defined concept in Irish law; in Ireland the expression is descriptive and context-dependent.