Regulation 3 designates the Nuclear Decommissioning Authority and its subsidiary Magnox Ltd. as persons required to make changes to relevant nuclear pension schemes in order to introduce reform of those schemes in accordance with section 311(1) of the Energy Act 2023 (c. 52). In accordance with section 311(7)(b) of that Act, scheme-specific changes, as defined in the Act, may be made in the case of a particular scheme on one occasion only.