| Enterprise Act 2002 | 2002 c. 40 | specified amended provision(s) | Commencement Order | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes |   commencement order for S.I. 2003/419 (N.I. 6) |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 22(10) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 32(1)(2) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 36 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 37 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 38 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 39 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 40 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 41(1)(c) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 45(1)-(8)(10) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 45(9) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 46 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 47 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 48 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 49 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 50 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 51 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 52(6) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 56 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 57(2)-(8) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 65 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 1 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 2 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 3 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 4 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 5 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 6 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 7 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch. 2 para. 8 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch 3 para. 7(2) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch 3 para. 8 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch 3 para. 28(2)(4) | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch 3 para. 29 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | Sch 5 | coming into force | The Energy (2003 Order) (Commencement No. 2) Order (Northern Ireland) 2004 | 2004 No. 71 | art. 2 Sch. | Yes | |