| Employment Relations Act 2004 | 2004 c. 24 | s. 1 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 2 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 3 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 4 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 5 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 6 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 7 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 8 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 9 | coming into force | The Employment Relations Act 2004 (Commencement No.4 and Transitional Provisions) Order 2005 | 2005 No. 2419 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 9(1)-(4) | omitted | Employment Rights Act 2025 | 2025 c. 36 | Sch. 6 para. 66(2)(a) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 9(5) | words substituted | Employment Rights Act 2025 | 2025 c. 36 | Sch. 6 para. 66(2)(b) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 9(6)-(9) | omitted | Employment Rights Act 2025 | 2025 c. 36 | Sch. 6 para. 66(2)(c) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 10 | coming into force | The Employment Relations Act 2004 (Commencement No.4 and Transitional Provisions) Order 2005 | 2005 No. 2419 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 10 | omitted | Employment Rights Act 2025 | 2025 c. 36 | Sch. 6 para. 66(3) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 11 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 12 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 13 | coming into force | The Employment Relations Act 2004 (Commencement No.4 and Transitional Provisions) Order 2005 | 2005 No. 2419 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 13 | omitted | Employment Rights Act 2025 | 2025 c. 36 | Sch. 6 para. 66(4) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 14 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 15 | coming into force | The Employment Relations Act 2004 (Commencement No.2 and Transitional Provisions) Order 2004 | 2004 No. 3342 | art. 4(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 16 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 17 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 18 | coming into force | The Employment Relations Act 2004 (Commencement No.2 and Transitional Provisions) Order 2004 | 2004 No. 3342 | art. 4(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 19 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 20 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 21 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 22 | coming into force | The Employment Relations Act 2004 (Commencement No.4 and Transitional Provisions) Order 2005 | 2005 No. 2419 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 23 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 24 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 24(2) | omitted | Trade Union Act 2016 | 2016 c. 15 | Sch. 4 para. 21(c) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 25 | coming into force | The Employment Relations Act 2004 (Commencement No.4 and Transitional Provisions) Order 2005 | 2005 No. 2419 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 26 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 26 | omitted | Employment Rights Act 2025 | 2025 c. 36 | s. 77(5)(a) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 27 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 27 | omitted | Employment Rights Act 2025 | 2025 c. 36 | s. 77(5)(b) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 28 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 28 | omitted | Employment Rights Act 2025 | 2025 c. 36 | s. 77(5)(c) | Not yet | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 29 | coming into force | The Employment Relations Act 2004 (Commencement No.1 and Transitional Provisions) Order 2004 | 2004 No. 2566 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 30 | coming into force | The Employment Relations Act 2004 (Commencement No.1 and Transitional Provisions) Order 2004 | 2004 No. 2566 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 31 | coming into force | The Employment Relations Act 2004 (Commencement No.1 and Transitional Provisions) Order 2004 | 2004 No. 2566 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 32 | coming into force | The Employment Relations Act 2004 (Commencement No.1 and Transitional Provisions) Order 2004 | 2004 No. 2566 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 33 | coming into force | The Employment Relations Act 2004 (Commencement No.2 and Transitional Provisions) Order 2004 | 2004 No. 3342 | art. 4(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 34 | coming into force | The Employment Relations Act 2004 (Commencement No.2 and Transitional Provisions) Order 2004 | 2004 No. 3342 | art. 4(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 35 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 36 | coming into force | The Employment Relations Act 2004 (Commencement No.2 and Transitional Provisions) Order 2004 | 2004 No. 3342 | art. 4(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 37 | coming into force | The Employment Relations Act 2004 (Commencement No.1 and Transitional Provisions) Order 2004 | 2004 No. 2566 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 38 | coming into force | The Employment Relations Act 2004 (Commencement No.1 and Transitional Provisions) Order 2004 | 2004 No. 2566 | art. 3(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 39 | coming into force | The Employment Relations Act 2004 (Commencement No.2 and Transitional Provisions) Order 2004 | 2004 No. 3342 | art. 4(a) | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 40 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |
| Employment Relations Act 2004 | 2004 c. 24 | s. 41 | coming into force | The Employment Relations Act 2004 (Commencement No.3 and Transitional Provisions) Order 2005 | 2005 No. 872 | art. 4 Sch. | Yes | |